Sequence alignment between 4u3f(H) and UniProt seq D0VX28 (D0VX28_CHICK):

D0VX28 (D0VX28_CHICK): Cytochrome b-c1 complex subunit 6 from Gallus gallus
                 10        20        30        40        50        60        70       
         ---------+---------+---------+---------+---------+---------+---------+-------
UniProt: LRGSGEEEEEELVDPLTTIREHCEQTEKCVKARERLELCDARVSSRSHTEEQCTEELFDFLHARDHCVAHKLFNKLK
PDB seq: ---------EELVDPLTTIREHCEQTEKCVKARERLELCDARVSSRSHTEEQCTEELFDFLHARDHCVAHKLFNKLK
                  ---------+---------+---------+---------+---------+---------+--------
                          20        30        40        50        60        70