>3F50_2|Chain B|alpha/beta-peptide analogue of the HIV gp41 CHR domain|null
XXTWEXWDXAIAEYAXRIEXLIXAAQEQQEKNEXALXELX
>3F50_1|Chain A|Envelope glycoprotein gp160|null
XSGIVQQQNNLLRAIEAQQHLLQLTVWGIKQLQARILX