AIDS-219981 AIDS219981 F-D1D1 NH2-dykddddkLGKFSQTC(x2)YNSAIQGSVLTSTC(x2)ERTNGGYNTSSIDLNSVIENVDGSLKWQLGKFSQTC(x1)YNSAIQGSVLTSTC(x1)ERTNGGYNTSSIDLNSVIENVDGSLKWQ-COOH