Sequence alignment between 1z8c(A) and UniProt seq Q9JAU9 (Q9JAU9_HV1):

Q9JAU9 (Q9JAU9_HV1): Protease (Fragment) from Human immunodeficiency virus type 1
                 10        20        30        40        50        60        70        80        90         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: PQITLWQRPLVTIKIGGQLKEALLDTGADDTVLEEMALPGRWKPKMIGGIGGFIKVRQYDQIPIEICGHKAIGTVLVGPTPTNIIGRNLLTQIGCTLNF
         ....................................X.............................X...X............X...............
PDB seq: PQITLWQRPLVTIKIGGQLKEALLDTGADDTVLEEMSLPGRWKPKMIGGIGGFIKVRQYDQIPIEIXGHKVIGTVLVGPTPTNVIGRNLLTQIGCTLNF
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
                 10        20        30        40        50        60        70        80        90