>d1s6sb_ b.50.1.1 (B:) Human immunodeficiency virus type 1 protease {Human immunodeficiency virus type 1} pqitlwkrplvtikiggqlkealldtgaddtvieemslpgrwkpkmiggiggfikvrqyd qiiieiaghkaigtvlvgptpvnvigrnlltqigatlnf