Molecular docking analysis of phytochemicals from ethanolic extract of crescentia cujete with the auto inhibited parkin catalytic domain.

The autoinhibited Parkin catalytic domain (PDB ID: 4BM9) receptor has been described to have a role in the ubiquitination of α-syn in Parkinson's disease. Therefore, it is of interest to discuss the molecular docking analysis data of phytochemicals from ethanolic extract of Crescentia cujete with the auto inhibited Parkin catalytic domain. We report the docking features of the phytochemical named 1, 2-Ethanediamine, N-(2-aminoethyl) with the target protein for further consideration towards the design and development of anti-Parkinson agents.

Elastic behavior of neodymium based manganites.

With a view to investigate the elastic behavior of Nd(0.67)A(0.33)MnO(3) (where A=Ca, Sr, Ba, Pb) manganite system, the samples were prepared by the sol gel method. After characterizing the samples structurally, a systematic investigation of ultrasonic longitudinal and transverse sound velocities of all the samples was undertaken by pulse transmission technique in the temperature range, 100-300K. It has been found that all the elasticity parameters, including Debye temperature, are found to increase continuously with increasing ionic radii of the dopant ion. All the samples are also found to exhibit anomalies in both the longitudinal and transverse velocities near their ferro to para magnetic transition (T(C)) temperatures. Apart from this, Nd(0.67)Ca(0.33)MnO(3) sample is also found to exhibit, a transition at its charge ordering temperature (T(co)). An explanation for the observed elastic anomalies based on a mean field theory has been given.

Ultrasonic velocity studies in the vicinity of T(C) of bismuth doped manganites.

Materials with the compositional formula La(0.67-x)Bi(x)Sr(0.33)MnO(3) (where x = 0, 0.1, 0.2, 0.3) prepared by a citrate gel route were used with a view to investigating the elastic behaviour of manganites in the vicinity of their T(C). The structural characterization of the materials clearly indicates that all the samples have a rhombohedral structure with [Formula: see text] space group. The magnetic (T(C)) as well as the metal-insulator (T(P)) transition temperatures determined by AC susceptibility and resistivity measurements, respectively, are found to decrease continuously with increasing bismuth concentration. Finally, the ultrasonic longitudinal velocities of all the samples are found to exhibit considerable softening in the vicinity of their magnetic transition temperatures, and an effort has been made to explain the observed behaviour by mean field theory and the Jahn-Teller phenomenon.

Unraveling the aflatoxin-FAPY conundrum: structural basis for differential replicative processing of isomeric forms of the formamidopyrimidine-type DNA adduct of aflatoxin B1.

Aflatoxin B1 (AFB) epoxide forms an unstable N7 guanine adduct in DNA. The adduct undergoes base-catalyzed ring opening to give a highly persistent formamidopyrimidine (FAPY) adduct which exists as a mixture of forms. Acid hydrolysis of the FAPY adduct gives the FAPY base which exists in two separable but interconvertible forms that have been assigned by various workers as functional, positional, or conformational isomers. Recently, this structural question became important when one of the two major FAPY species in DNA was found to be potently mutagenic and the other a block to replication [Smela, M. E.; Hamm, M. L.; Henderson, P. T.; Harris, C. M.; Harris, T. M.; Essigmann, J. M. Proc. Natl. Acad. Sci. U.S.A. 2002, 99, 6655-6660]. NMR studies carried out on the AFB-FAPY bases and deoxynucleoside 3',5'-dibutyrates now establish that the separable FAPY bases and nucleosides are diastereomeric N5 formyl derivatives involving axial asymmetry around the congested pyrimidine C5-N5 bond. Anomerization of the protected beta-deoxyriboside was not observed, but in the absence of acyl protection, both anomerization and furanosyl --> pyranosyl ring expansion occurred. In oligodeoxynucleotides, two equilibrating FAPY species, separable by HPLC, are assigned as anomers. The form normally present in duplex DNA is the mutagenic species. It has previously been assigned as the beta anomer by NMR (Mao, H.; Deng, Z. W.; Wang, F.; Harris, T. M.; Stone, M. P. Biochemistry 1998, 37, 4374-4387). In single-stranded environments the dominant species is the beta anomer; it is a block to replication.

Serological response to early measles vaccination.

This study compares the persistence of measles IgG antibody in 239 children vaccinated at 6-8 months of age with 76 children vaccinated after 8 months of age. Among the children vaccinated prior to 9 months, 49 per cent of the children between 16 and 44 months and 33 per cent of children over 54 months had levels of measles IgG antibody conventionally considered protective. Among the children older than 48 months, 67 per cent of children vaccinated before 9 months and 13 per cent of children vaccinated after 8 months had antibody levels below the conventionally accepted protective levels of 0.2 IU/ml. Older children had lower antibody levels than younger children. Measles immunization before 9 months with the standard titer Edmonston-Zagreb vaccine has not provided a large proportion of under-five children with protective levels of measles IgG antibody. A significant proportion of children vaccinated at the currently recommended age also had suboptimal levels. It is difficult to protect the majority of the measles-susceptible population with a single dose regardless of the immunization schedule used. A second dose of measles vaccine may be necessary to increase the herd immunity.