Evolutionary Pattern of Asian HIV-1 Subtype B from 1990 to 2007: In Silico Analysis Based on Envelop Protein

Table 1

Amino acids frequency at the fourth position of the GPGX tetramer of V3 loop of HIV-1 subtype B.

Amino acid	Percentage of subtype B isolates in Asia
Arginine (R)	73%
Glutamin (Q)	11%
Serine (S)	8%
Others	8%