Abstract: Sequence analyses of the passage 18 virus revealed changes in three amino acids in the
reverse transcriptase (
RT)-encoding region of the
pol gene: P to S at codon 119 (
P119S; present in 3 of 13 and 28 of 28 molecular clones before and after F-ddA exposure, respectively),
V179D (0 of 13 and 9 of 28, respectively), and
L214F (9 of 13 and 28 of 28, respectively).