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1.
Health Care Manage Rev ; 49(3): 186-197, 2024.
Article in English | MEDLINE | ID: mdl-38757912

ABSTRACT

BACKGROUND: Previous research has identified some tensions that public organizations may encounter during crises. However, there remains a scarcity of research examining how public health care organizations effectively navigate these tensions to reconcile the diverse interests, needs, and demands from various stakeholders. PURPOSES: The study seeks to shed light on the dynamics underlying the tensions experienced by public hospitals during the COVID-19 pandemic. It illustrates how different hospitals' actors have navigated these tensions, identifying solutions and approaches that fostered collaborative endeavors among internal and external stakeholders. METHODOLOGY: The study draws on qualitative analyses of 49 semistructured interviews and the notes from two focus groups involving key informants at one of the largest university hospitals in Italy. We also rely on the verbatim transcripts from meetings involving the members of the temporary emergency team constituting the taskforce. FINDINGS: The results highlight the tensions that emerged throughout the different waves of the COVID-19 pandemic and how various actors have managed them in a way to reconcile opposing forces while unleashing adaptability and creativity. PRACTICE IMPLICATIONS: Hospital managers would benefit from developing a paradoxical mindset for crisis preparedness, allowing them to embrace existing tensions and devise creative solutions to favor resilience and change.


Subject(s)
COVID-19 , Focus Groups , Hospitals, University , Pandemics , Qualitative Research , COVID-19/epidemiology , Italy/epidemiology , Humans , Hospitals, University/organization & administration , Interviews as Topic , SARS-CoV-2
2.
J Appl Psychol ; 108(10): 1573-1597, 2023 Oct.
Article in English | MEDLINE | ID: mdl-37289533

ABSTRACT

Although cross-national work-family research has made great strides in recent decades, knowledge accumulation on the impact of culture on the work-family interface has been hampered by a limited geographical and cultural scope that has excluded countries where cultural expectations regarding work, family, and support may differ. We advance this literature by investigating work-family relationships in a broad range of cultures, including understudied regions of the world (i.e., Sub-Saharan Africa, Southern Asia). We focus on humane orientation (HO), an overlooked cultural dimension that is however central to the study of social support and higher in those regions. We explore its moderating effect on relationships between work and family social support, work-family conflict, and work-family positive spillover. Building on the congruence and compensation perspectives of fit theory, we test alternative hypotheses on a sample of 10,307 participants from 30 countries/territories. We find HO has mostly a compensatory role in the relationships between workplace support and work-to-family conflict. Specifically, supervisor and coworker supports were most strongly and negatively related to conflict in cultures in which support is most needed (i.e., lower HO cultures). Regarding positive spillover, HO has mostly an amplifying role. Coworker (but not supervisor) support was most strongly and positively related to work-to-family positive spillover in higher HO cultures, where providing social support at work is consistent with the societal practice of providing support to one another. Likewise, instrumental (but not emotional) family support was most strongly and positively related to family-to-work positive spillover in higher HO cultures. (PsycInfo Database Record (c) 2023 APA, all rights reserved).


Subject(s)
Conflict, Psychological , Family Conflict , Humans , Family Relations , Social Support , Workplace
3.
PLoS One ; 17(11): e0275603, 2022.
Article in English | MEDLINE | ID: mdl-36374912

ABSTRACT

This study explores the influence of the power of family business successors on firm innovation under the theory of social embeddedness. Based on the 2000-2019 unbalanced panel data of listed Chinese family enterprises, this study empirically examines the differences in the influence of the implicit and explicit power of successors on incremental and radical innovation respectively. Our findings show that explicit power has a more positive impact on incremental innovation, while implicit power is more conducive to promoting radical innovation. In addition, the study finds that the reason why the explicit power of succession does not have a significant impact on radical innovation, that is, the reason why board dissent is not related to radical innovation, is that some of the major innovation decisions in the enterprise are not all made at formal meetings. The research conclusions not only extend the theoretical application of social embeddedness in family enterprises, but also provide certain practical guidance for promoting enterprise innovation.


Subject(s)
Commerce , Dissent and Disputes , China
4.
Vaccine ; 40(15): 2324-2330, 2022 04 01.
Article in English | MEDLINE | ID: mdl-35248424

ABSTRACT

The COVID-19 pandemic has changed routine care practice for older persons, especially in those with frailty living in long term care (LTC) facilities. Due to the high mortality rates of Nursing home (NH) residents during the first wave of the COVID-19 pandemic, priority for COVID-19 vaccinations was given to this vulnerable population. However, the safety and efficacy of such vaccines in older frail elders remains questionable due to the fact that initial randomized clinical trials (RCTs) for such vaccines did not include this population. This type of discrimination in patient participation in RCTs continues and has been recognized in the literature. Nevertheless, in the context of a worldwide emergency, COVID-19 vaccination in older persons living in LTC facilities may provide a solid basis to protect against negative outcomes, such as COVID-19 infection and death. In this report, we present the protocol of the GeroCovid Vax study, an Italian study that began in February 2021 which is aimed at investigating the safety and efficacy of the anti-SARS-CoV-2 vaccinations in older persons living in LTCs. This protocol specially aims to continuously and closely monitor events related to- and following- the anti-SARS-CoV-2 vaccination in elderly living in LTC facilities. In this report, we will provide information related to the study protocol and describe baseline characteristics of the sample.


Subject(s)
COVID-19 , Frailty , Aged , Aged, 80 and over , COVID-19/prevention & control , COVID-19 Vaccines , Humans , Long-Term Care , SARS-CoV-2
5.
Front Psychol ; 9: 1723, 2018.
Article in English | MEDLINE | ID: mdl-30271366

ABSTRACT

Given the increasing use of technology and the growing blurring of the boundaries between the work and nonwork domains, decisions about when to interrupt work for family and vice versa can have critical implications for relationship satisfaction within dual-earner couples. Using a sample of 104 dual-earner couples wherein one of the partners is a member of the largest Italian smartphone-user community, this study examines how variation in boundary management permeability within dual-earner couples relates to partner relationship satisfaction, and whether the effect differed by gender and partners' agreement on caregiving roles in the family. Using actor-partner analysis, we examined the degree to which an individual and his or her partner's level of family-interrupting work behaviors (FIWB, e.g., taking a call from the partner while at work) and work-interrupting family behaviors (WIFB, e.g., checking work emails during family dinner) was positively related to relationship satisfaction. Results show that women experienced greater relationship satisfaction than men when their partners engaged in higher levels of FIWB, and this relationship was stronger when partners had perceptual congruence on who is primarily responsible for caregiving arrangements in the family. This study advances research on dual-earner couples by showing the importance of examining boundary management permeability as a family social phenomenon capturing transforming gender roles.

6.
Curr Opin Clin Nutr Metab Care ; 21(1): 10-13, 2018 Jan.
Article in English | MEDLINE | ID: mdl-29035971

ABSTRACT

PURPOSE OF REVIEW: The current article reviews recently published evidence of the important role that specific dietary patterns may hold on preventing cognitive impairment and dementia over aging. RECENT FINDINGS: Specific dietary patterns attributed to targeting cardiovascular risk factors may protect against the development of mild cognitive impairment (MCI) and dementia, especially Alzheimer's disease. Numerous epidemiological studies have strongly suggested that multinutrient approaches using the Mediterranean diet (Med diet), dietary approach to systolic hypertension (DASH) and the Mediterranean-DASH diet intervention for neurodegenerative delay (MIND) are associated with a lower risk of cognitive impairment, MCI and Alzheimer's disease in older persons. This multinutrient approach seems to hold better outcomes than single nutrient intervention. There is only one randomized clinical trial (PREDIMED study) showing an improvement in cognitive performance over time in those undergoing a Med diet protocol. SUMMARY: Nutrition is an essential and modifiable risk factor that plays a role on preventing and/or delaying the onset of dementia. There is sufficient evidence to hypothesize testing neuroprotective dietary patterns on cognition in randomized clinical trials in older persons. Healthy dietary patterns such as the Med diet, DASH and MIND deserve further attention in randomized clinical trials on cognitive performance outcomes.


Subject(s)
Aging , Cognitive Dysfunction/prevention & control , Diet, Healthy , Elder Nutritional Physiological Phenomena , Evidence-Based Medicine , Patient Compliance , Aged , Aged, 80 and over , Cognitive Dysfunction/epidemiology , Diet, Mediterranean , Dietary Approaches To Stop Hypertension , Humans , Neuroprotection , Nutritional Status , Risk
7.
J Am Med Dir Assoc ; 18(6): 465-469, 2017 Jun 01.
Article in English | MEDLINE | ID: mdl-28549702

ABSTRACT

This article reports the findings of a survey on end-of-life (EOL) care in nursing homes of 18 long-term care experts across 15 countries. The experts were chosen as a convenience-based sample of known experts in each country. The survey was administered in 2016 and included both open-ended responses for defining hospice care, palliative care, and "end of life," and a series of questions related to the following areas-attitudes toward EOL care, current practice and EOL interventions, structure of care, and routine barriers. Overall experts strongly agreed that hospice and palliative care should be available in long-term care facilities and that both are defined by holistic, interdisciplinary approaches using measures of comfort across domains. However, it appears the experts felt that in most countries the reality fell short of what they believed would be ideal care. As a result, experts call for increased training, communication, and access to specialized EOL services within the nursing home.


Subject(s)
Internationality , Nursing Homes , Terminal Care , Health Care Surveys , Hospice Care , Humans , Palliative Care
8.
Virus Res ; 177(2): 217-21, 2013 Nov 06.
Article in English | MEDLINE | ID: mdl-24012516

ABSTRACT

A virus was isolated from potted plants of an unidentified species of Aeonium, a succulent ornamental very common in Southern Italy, showing chlorotic spots and rings on both leaf surfaces. It was successfully transmitted by sap inoculation to a limited range of hosts, including Nicotiana benthamiana which was used for ultrastructural observations and virus purification. Virus particles are isometric, ca. 30nm in diameter, have a single type of coat protein (CP) subunits 54kDa in size, that encapsidate single-stranded positive-sense RNA species of 7549 (RNA1) and 4010 (RNA2) nucleotides. A third RNA molecule 3472 nts in size entirely derived from RNA2 was also found. The structural organization of both genomic RNAs and the cytopathological features were comparable to those of nepoviruses. In addition, amino acid sequence comparisons of CP and the Pro-Pol region (a sequence containing parts of the proteinase and polymerase) with those of other nepoviruses showed that the Aeonium virus belongs to the subgroup A of the genus Nepovirus and is phylogenetically close to, but serologically distinct from tobacco ringspot virus (TRSV). Based on the species demarcation criteria for the family Secoviridae, the virus under study appears to be a novel member of the genus Nepovirus for which the name of Aeonium ringspot virus (AeRSV) is proposed.


Subject(s)
Crassulaceae/virology , Nepovirus/isolation & purification , Plant Diseases/virology , Capsid Proteins/genetics , Italy , Molecular Sequence Data , Nepovirus/classification , Nepovirus/genetics , Nepovirus/ultrastructure , Phylogeny
9.
Virus Res ; 168(1-2): 84-7, 2012 Sep.
Article in English | MEDLINE | ID: mdl-22709553

ABSTRACT

Tombusviruses may support the replication of satellite (sat) RNAs. In particular, two satRNAs, sat L and Cymsat RNAs, are replicated by carnation Italian ringspot (CIRV) and tomato bushy stunt (TBSV) virus, but not by cymbidium ringspot virus (CymRSV) in vitro transcripts unless they contain a poly(A) tail at the 3' end. Conversely, the replication of both satRNAs was supported by virus particles or viral RNA of the original CymRSV inoculum even in the absence of the poly(A) tail. Sequence and mutational analyses revealed that the full-length infectious CymRSV clone contains one relevant sequence variation in the ORF 1-encoded protein (p33) compared with the original inoculum, i.e. a Ser19 TCC codon instead of a Phe19 TTC codon, which inhibited the replication of sat L and Cymsat RNAs. It is suggested that this amino acid is contained in a domain essential for the replication of some subviral RNAs.


Subject(s)
Amino Acid Substitution , Open Reading Frames , RNA, Satellite/metabolism , RNA, Viral/metabolism , Tombusvirus/genetics , Viral Proteins/genetics , Amino Acid Sequence , Molecular Sequence Data , RNA, Satellite/genetics , RNA, Viral/genetics , Tombusvirus/metabolism , Viral Proteins/metabolism
10.
Arch Virol ; 157(8): 1629-33, 2012 Aug.
Article in English | MEDLINE | ID: mdl-22592959

ABSTRACT

Tepovirus is a new monotypic genus of plant viruses typified by potato virus T (PVT), a virus with helically constructed filamentous particles that are 640 nm long, previously classified as unassigned species in the family Betaflexiviridae. Virions have a single-stranded positive-sense polyadenylated RNA genome that is 6.5 kb in size, and a single type of coat protein with a size of 24 kDa. The viral genome contains three slightly overlapping ORFs encoding, respectively, the replication-related proteins (ORF1), a putative movement protein of the 30 K type (ORF2) and the coat protein (ORF3). Its structure and organization (number and order of genes) resembles that of trichoviruses and of citrus leaf blotch virus (CLBV, genus Citrivirus) but has a smaller size. Besides potato, the primary host, PVT can experimentally infect herbaceous hosts by mechanical inoculation. No vector is known, and transmission is through propagating material (tubers), seeds and pollen. PVT has a number of biological, physical and molecular properties that differentiate it from betaflexiviruses with a 30K-type movement protein. It is phylogenetically distant from all these viruses, but least so from grapevine virus A (GVA), the type member of the genus Vitivirus, with which it groups in trees constructed using the sequences of all of the genes.


Subject(s)
Flexiviridae/classification , Flexiviridae/genetics , Solanum tuberosum/virology , Amino Acid Sequence , Base Composition , Genome, Viral , Phylogeny , Viral Proteins/chemistry , Viral Proteins/genetics
11.
J Gen Virol ; 88(Pt 5): 1634-1642, 2007 May.
Article in English | MEDLINE | ID: mdl-17412997

ABSTRACT

The replication of Cymbidium ringspot virus (CymRSV) defective interfering (DI) RNA in cells of the yeast Saccharomyces cerevisiae normally takes place in association with the peroxisomal membrane, thus paralleling the replication events in infected plant cells. However, previous results with a peroxisome-deficient mutant strain of yeast had suggested that the presence of peroxisomes is not a strict requirement for CymRSV DI RNA replication. Thus, a novel approach was used to study the putative alternative sites of replication by using S. cerevisiae strain YPH499 which does not contain normal peroxisomes. In this strain, CymRSV p33 and p92 accumulated over portions of the nuclear membrane and on membranous overgrowths which were identified as endoplasmic reticulum (ER) strands, following immunofluorescence and immunoelectron microscope observations. The proteins were not released by high-pH treatment, but were susceptible to proteolytic digestion, thus indicating peripheral and not integrated association. ER-associated p33 and p92 proteins supported in trans the replication of DI RNA. The capacity of plus-strand RNA viruses to replicate in association with different types of cell membranes was thus confirmed.


Subject(s)
Endoplasmic Reticulum/virology , Intracellular Membranes/virology , RNA, Small Interfering/genetics , RNA, Viral/genetics , Saccharomyces cerevisiae/virology , Tombusvirus/genetics , DNA Mutational Analysis , Endoplasmic Reticulum/ultrastructure , Intracellular Membranes/ultrastructure , Peroxisomes/genetics , Viral Proteins/genetics
12.
J Gen Virol ; 87(Pt 3): 705-714, 2006 Mar.
Article in English | MEDLINE | ID: mdl-16476994

ABSTRACT

The replicase proteins p33 and p92 of Cymbidium ringspot virus (CymRSV) were found to support the replication of defective interfering (DI) RNA in Saccharomyces cerevisiae cells. Two yeast strains were used, differing in the biogenesis of peroxisomes, the organelles supplying the membranous vesicular environment in which CymRSV RNA replication takes place in infected plant cells. Double-labelled immunofluorescence showed that both p33 and p92 replicase proteins localized to peroxisomes, independently of one another and of the presence of the replication template. It is suggested that these proteins are sorted initially from the cytosol to the endoplasmic reticulum and then to peroxisomes. However, only the expression of p33, but not p92, increased the number of peroxisomes and induced membrane proliferation. DI RNA replication occurred in yeast cells, as demonstrated by the presence of monomers and dimers of positive and negative polarities. Labelling with BrUTP showed that peroxisomes were the sites of nascent viral synthesis, whereas in situ hybridization indicated that DI RNA progeny were diffused throughout the cytoplasm. DI RNA replication also took place in yeast cells devoid of peroxisomes. It is suggested that replication in these cells was targeted to the endoplasmic reticulum.


Subject(s)
Defective Viruses/genetics , RNA, Viral/biosynthesis , Saccharomyces cerevisiae/virology , Tombusvirus/genetics , Cell Biology , Cytoplasm/metabolism , RNA Interference/physiology , RNA-Dependent RNA Polymerase/metabolism , Viral Proteins/metabolism
13.
J Gen Virol ; 85(Pt 10): 3115-3122, 2004 Oct.
Article in English | MEDLINE | ID: mdl-15448375

ABSTRACT

Yeast cells co-expressing the replication proteins p36 and p95 of Carnation Italian ringspot virus (CIRV) support the RNA-dependent replication of several defective interfering (DI) RNAs derived from either the genome of CIRV or the related Cymbidium ringspot virus (CymRSV), but not the replication of a satellite RNA (sat RNA) originally associated with CymRSV. DI, but not sat RNA, was replicated in yeast cells co-expressing both DI and sat RNA. Using transgenic Nicotiana benthamiana plants constitutively expressing CymRSV replicase proteins (p33 and p92), or transiently expressing either these proteins or CIRV p36 and p95, it was shown that expression of replicase proteins alone was also not sufficient for the replication of sat RNA in plant cells. However, it was also shown that replicating CIRV genomic RNA deletion mutants encoding only replicase proteins could sustain replication of sat RNA in plant cells. These results suggest that sat RNA has a replication strategy differing from that of genomic and DI RNAs, for it requires the presence of a cis-replicating genome acting as a trans-replication enhancer.


Subject(s)
Defective Viruses/genetics , Open Reading Frames , RNA Interference , RNA, Satellite/biosynthesis , Tombusvirus/genetics , Virus Replication , RNA-Dependent RNA Polymerase/physiology , Yeasts/genetics
14.
J Gen Virol ; 85(Pt 8): 2429-2433, 2004 Aug.
Article in English | MEDLINE | ID: mdl-15269385

ABSTRACT

The p36 and p95 proteins of Carnation Italian ringspot virus (CIRV), when expressed in Saccharomyces cerevisiae, supported the replication of defective interfering (DI) RNA. Double-label confocal immunofluorescence showed that both proteins localized to mitochondria, independently of each other. DI RNA progeny was localized by in situ hybridization both to mitochondria and to their proximity. Fractionation of cell extracts showed that replicase proteins associated with membranes with a consistent portion of DI RNA. DI RNA transcripts were stabilized more efficiently when co-expressed with both p36 and p95 than with either protein alone. By using the copper-inducible CUP1 promoter, p36 was shown to have an effect on DI RNA stability only above a threshold concentration, suggesting an 'all-or-none' behaviour. Conversely, the stabilizing activity of p95 was proportional to protein concentration in the range examined. Similarly, DI RNA replication level was proportional to p95 concentration and depended on a threshold concentration of p36.


Subject(s)
Defective Viruses/genetics , Dianthus/virology , RNA Interference , RNA, Viral/biosynthesis , RNA-Dependent RNA Polymerase/physiology , Tombusvirus/genetics , RNA, Viral/chemistry , Tombusvirus/enzymology
15.
J Virol ; 78(9): 4744-52, 2004 May.
Article in English | MEDLINE | ID: mdl-15078956

ABSTRACT

Open reading frame 1 in the viral genome of Cymbidium ringspot virus encodes a 33-kDa protein (p33), which was previously shown to localize to the peroxisomal membrane in infected and transgenic plant cells. To determine the sequence requirements for the organelle targeting and membrane insertion, the protein was expressed in the yeast Saccharomyces cerevisiae in native form (33K) or fused to the green fluorescent protein (33KGFP). Cell organelles were identified by immunolabeling of marker proteins. In addition, peroxisomes were identified by simultaneous expression of the red fluorescent protein DsRed containing a peroxisomal targeting signal and mitochondria by using the dye MitoTracker. Fluorescence microscopy showed the 33KGFP fusion protein concentrated in a few large bodies colocalizing with peroxisomes. These bodies were shown by electron microscopy to be composed by aggregates of peroxisomes, a few mitochondria and endoplasmic reticulum (ER) strands. In immunoelectron microscopy, antibodies to p33 labeled the peroxisomal clumps. Biochemical analysis suggested that p33 is anchored to the peroxisomal membrane through a segment of ca. 7 kDa, which corresponds to the sequence comprising two hydrophobic transmembrane domains and a hydrophilic interconnecting loop. Analysis of deletion mutants confirmed these domains as essential components of the p33 peroxisomal targeting signal, together with a cluster of three basic amino acids (KRR). In yeast mutants lacking peroxisomes p33 was detected in the ER. The possible involvement of the ER as an intermediate step for the integration of p33 into the peroxisomal membrane is discussed.


Subject(s)
Peroxisomes/metabolism , Saccharomyces cerevisiae/metabolism , Tombusvirus/genetics , Viral Proteins/metabolism , Gene Deletion , Green Fluorescent Proteins , Luminescent Proteins/genetics , Luminescent Proteins/metabolism , Membrane Proteins/genetics , Membrane Proteins/metabolism , Microscopy, Electron , Microscopy, Fluorescence , Recombinant Fusion Proteins/genetics , Recombinant Fusion Proteins/metabolism , Saccharomyces cerevisiae/genetics , Signal Transduction , Tombusvirus/metabolism , Viral Proteins/genetics
16.
J Virol ; 77(3): 2116-23, 2003 Feb.
Article in English | MEDLINE | ID: mdl-12525646

ABSTRACT

Two plasmids from which the sequences coding for the 36- and 95-kDa proteins of Carnation Italian ringspot virus (CIRV) could be transcribed in vivo in the yeast Saccharomyces cerevisiae under the control of the ADH1 promoter and terminator were constructed. The two proteins, which constitute the viral replicase, were correctly translated and integrated into membranes of the yeast cells. An additional plasmid was introduced in yeasts expressing the CIRV replicase, from which a defective interfering (DI) RNA (DI-7 RNA) could be transcribed under the control of the GAL1 promoter and terminated by the Tobacco ringspot virus satellite ribozyme, which cleaved 19 nucleotides downstream of the 3' end of DI RNA. The DI-7 RNA transcripts were amplified by the viral replicase as demonstrated by the restoration of the authentic 3' end, the requirement of a specific cis-acting signal at this terminus, the preferential accumulation of molecules with the authentic 5' terminus (AGAAA), the synthesis of head-to-tail dimers, the presence of negative strands, and the incorporation of 5-bromo-UTP. Additionally, transformation with a dimeric construct of DI-7 RNA led to the synthesis of monomers, mimicking the activity of the viral replicase in plant cells.


Subject(s)
Defective Viruses/physiology , Dianthus/virology , RNA Interference/physiology , RNA, Viral/biosynthesis , Saccharomyces cerevisiae/virology , Tombusvirus/physiology , Uridine Triphosphate/analogs & derivatives , Virus Replication , Dimerization , Promoter Regions, Genetic , Replicon , Transcription, Genetic , Uridine Triphosphate/metabolism
17.
J Virol ; 76(20): 10485-96, 2002 Oct.
Article in English | MEDLINE | ID: mdl-12239325

ABSTRACT

Replication of the Carnation Italian ringspot virus genomic RNA in plant cells occurs in multivesicular bodies which develop from the mitochondrial outer membrane during infection. ORF1 in the viral genome encodes a 36-kDa protein, while ORF2 codes for the 95-kDa replicase by readthrough of the ORF1 stop codon. We have shown previously that the N-terminal part of ORF1 contains the information leading to vesiculation of mitochondria and that the 36-kDa protein localizes to mitochondria. Using infection, in vivo expression of green fluorescent protein fusions in plant and yeast cells, and in vitro mitochondrial integration assays, we demonstrate here that both the 36-kDa protein and the complete replicase are targeted to mitochondria and anchor to the outer membrane with the N terminus and C terminus on the cytosolic side. Analysis of deletion mutants indicated that the anchor sequence is likely to correspond approximately to amino acids 84 to 196, containing two transmembrane domains. No evidence for a matrix-targeting presequence was found, and the data suggest that membrane insertion of the viral proteins is mediated by an import receptor-independent signal-anchor mechanism relying on the two transmembrane segments and multiple recognition signals present in the N-terminal part of ORF1.


Subject(s)
Mitochondria/metabolism , RNA-Dependent RNA Polymerase/metabolism , Tombusviridae/enzymology , Animals , Intracellular Membranes/metabolism , Mutagenesis , RNA-Dependent RNA Polymerase/genetics , Rabbits , Nicotiana , Yeasts
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