>d1mtrb_ b.50.1.1 (B:) Human immunodeficiency virus type 1 protease {Human immunodeficiency virus type 1} pqitlwkrplvtiriggqlkealldtgaddtvieemnlpgkwkpkmiggiggfikvrqyd qipveighkaigtvlvgptpvniigrnlltqigtlnf