AIDS-211971 AIDS211971 NH2-Arg-Ser-Gln-Lys-Glu-Gly-Leu-His-Tyr-Thr-Cys-Ser-Ser-His-Phe-Pro-Tyr-Ser-Gln-Tyr-Gln-Phe-Trp-Lys-COOH