>3PHV_1|Chain A|UNLIGANDED HIV-1 PROTEASE|HIV-1 M:B_HXB2R (11706) PQITLWQRPLVTIKIGGQLKEALLDTGADDTVLEEMSLPGRWKPKMIGGIGGFIKVRQYDQILIEICGHKAIGTVLVGPTPVNIIGRNLLTQIGCTLNF