3MI9_C 2 EPVDPrlepwkhpgsqpktaCTN-CYCKKCCFHCQVCFITKALGISYGRKKRrqRRRAHQNSQT 64 HIV-1 M:B_HXB2R P18098 45 RPLEP---------------CTNkCYCKRCSFHCQLCFSKKGLGISYERKGR--RRRTPRKTKT 91 Human immunodeficiency virus type 2 (...