AIDS-188893 AIDS188893 Ac-CSFNISTSIR GKVQKEYAFF YKLD-NH2 Ac-Cys-Ser-Phe-Asn-Ile-Ser-Thr-Ser-Ile-Arg-Gly-Lys-Val-Gln-Lys-Glu-Tyr-Ala-Phe-Phe-Tyr-Lys-Leu-Asp-NH2 Residues 157-180 of gp120/gp41