Sequence alignment between 4fn6(A) and UniProt seq Q6GEY1 (TENA_STAAR):

Q6GEY1 (TENA_STAAR): Aminopyrimidine aminohydrolase from Staphylococcus aureus (strain MRSA252)
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MEFSQKLYQAAKPIINDIYEDDFIQKMLLGNIQADALRHYLQADAAYLKEFTNLYALLIPKMNSMNDVKFLVEQIEFMVEGEVLAHDILAQIVGESYEEIIKTKVWPPSGDHYIKHMYFQAHSRENAIYTIAAMAPCPYIYAELAKRSQSDHKLNREKDTAKWFDFYSTEMDDIINVFESLMNKLAESMSDKELEQVKQVFLESCIHERRFFNMAMTLEQWEFGGKVND
         ........................................................................................................................................X............................................................................................
PDB seq: MEFSQKLYQAAKPIINDIYEDDFIQKMLLGNIQADALRHYLQADAAYLKEFTNLYALLIPKMNSMNDVKFLVEQIEFMVEGEVLAHDILAQIVGESYEEIIKTKVWPPSGDHYIKHMYFQAHSRENAIYTIAAMAPXPYIYAELAKRSQSDHKLNREKDTAKWFDFYSTEMDDIINVFESLMNKLAESMSDKELEQVKQVFLESCIHERRFFNMAMTLEQWEFGG----
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+-----    
                 10        20        30        40        50        60        70        80        90       100       110       120       130       140       150       160       170       180       190       200       210       220