Sequence alignment between 3cx5(W) and UniProt seq P00044 (CYC1_YEAST):

P00044 (CYC1_YEAST): Cytochrome c isoform 1 from Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 
                 10        20        30        40        50        60        70        80        90       100         
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+---------
UniProt: MTEFKAGSAKKGATLFKTRCLQCHTVEKGGPHKVGPNLHGIFGRHSGQAEGYSYTDANIKKNVLWDENNMSEYLTNPKKYIPGTKMAFGGLKKEKDRNDLITYLKKACE
         .............................................................................X...............................
PDB seq: -TEFKAGSAKKGATLFKTRCLQCHTVEKGGPHKVGPNLHGIFGRHSGQAEGYSYTDANIKKNVLWDENNMSEYLTNPXKYIPGTKMAFGGLKKEKDRNDLITYLKKACE
          ---------+---------+---------+---------+---------+---------+---------+---------+---------+---------+--------
                  10        20        30        40        50        60        70        80        90       100