Abstract: These include a cluster of five mutations in the
reverse-transcriptase (
RT) coding region (
A62V,
V75I,
F77L,
F116Y, and
Q151M) generally referred to as multidrug resistance (MDR) mutations, and insertions of one or several amino acid residues between codons 67 and 70 of
RT, a flexible region joining two antiparrallel beta sheets (beta3-beta4 insertions).