>2QAK_1|Chains A, B|PROTEASE RETROPEPSIN|human immunodeficiency virus 1 (11676) PQITLWQRPLVTIKIGGQLKEALLDTGADNTVLEEMSLPGRWKPKMIGGIGGFIAVRQYDQILIEICGHKAIGTVLVGPTPVNIIGRNLMTQIGCTLNF