>9zrx_b mol:protein length:503 Envelope gp120MDAMKRGLCCVLLLCGAVFVSPSQEIHARFRRGARAENLWVTVYYGVPVWRDAETTLFCASDAKAYETEKHNVWATHACVPTDPNPQEIHLDNVTEKFNMWKNNMVEQMHTDIISLWDQSLKPCVKLTPLCVTLHCTNVTSVNTTGDREELKNCSFNMTTELRDKRQKVYSLFYRLDIVPINENQGSEYRLINCNTSACTQACPKVSFEPIPIHYCAPAGFAILKCKDEGFNGTGLCKNVSTVQCTHGIKPVVSTQLLLNGSLAEKNITIRSENITNNAKIIIVQLVQPVTIKCIRPNNYTRKSIRIGPGQAFYAMGDIIGDIRQAHCNVSRSRWNKTLQEVAEKLRTYFGNKTIIFANSSGGDLEITTHSFNCGGEFFYCNTSGLFNSTWYVNSTWNDTDSTQESNDTITLPCRIKQIINMWQRAGQCMYAPPIPGVIKCESNITGLLLTRDGGKDNNVNETFRPGGGDMRDNWRSELYKYKVVEIEPLGVAPTRCKRRVVE