Amino acid alterations between the reverse transcriptase
of HXB2 reference sequence and YU2

Residue
HXB2
YU2
121
D
H
142
I
T
166
K
T
178
I
L
214
L
F
272
P
A
357
M
T
376
T
A
435
V
I
461
R
K
468
T
S
512
Q
R
519
N
S