Abstract: Lamivudine-resistant HBV mutants display specific mutations in the
YMDD (tyrosine, methionine, aspartate, aspartate) motif of the viral
polymerase (
reverse transcriptase [
rt]), which is the catalytic site of the enzyme, i.e.,
methionine 204 to isoleucine (
rtM204I) or valine (
rtM204V).