Sequence alignment between 1bcc(H) and UniProt seq P00126 (QCR6_BOVIN):

P00126 (QCR6_BOVIN): Cytochrome b-c1 complex subunit 6, mitochondrial from Bos taurus
                 10        20        30        40        50        60        70        80        90 
         ---------+---------+---------+---------+---------+---------+---------+---------+---------+-
UniProt: MGLEDEQRMLTGSGDPKEEEEEEEELVDPLTTVREQCEQLEKCVKARERLELCDERVSSRSQTEEDCTEELLDFLHARDHCVAHKLFNSLK
         .......................................................................X...................
PDB seq: -------------------------LVDPLTTVREQCEQLEKCVKARERLELCDERVSSRSQTEEDCTEELFDFLHARDHCVAHKLFNSLK
                                  -------+---------+---------+---------+---------+---------+--------
                                        20        30        40        50        60        70