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4.
Antimicrob Agents Chemother ; 49(9): 3930-2, 2005 Sep.
Article in English | MEDLINE | ID: mdl-16127074

ABSTRACT

Serial passage of human immunodeficiency virus type 1 in MT-2 cells in increasing concentrations of the d- and l-enantiomers of beta-2',3'-didehydro-2',3'-dideoxy-5-fluorocytidine (d4FC) resulted in the selection of viral variants with reverse transcriptase substitutions M184I or M184V for l-d4FC and I63L, K65R, K70N, K70E, or R172K for d-d4FC. Phenotypic analysis of site-directed mutants defined the role of these mutations in reducing susceptibility to l- or d-d4FC.


Subject(s)
Anti-HIV Agents/pharmacology , Cytidine Triphosphate/analogs & derivatives , HIV-1/drug effects , Reverse Transcriptase Inhibitors/pharmacology , Amino Acid Substitution , Cell Line , Cytidine Triphosphate/pharmacology , Drug Resistance, Viral , HIV Reverse Transcriptase/genetics , HIV Reverse Transcriptase/metabolism , HIV-1/enzymology , HIV-1/genetics , Humans , Mutagenesis, Site-Directed , Mutation/genetics , Stereoisomerism , Structure-Activity Relationship , Zalcitabine/analogs & derivatives
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