Sequence alignment between 6hu9(l) and UniProt seq Q2V2P9 (COX26_YEAST):

Q2V2P9 (COX26_YEAST): Cytochrome c oxidase subunit 26, mitochondrial from Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 
                 10        20        30        40        50        60      
         ---------+---------+---------+---------+---------+---------+------
UniProt: MFFSQVLRSSARAAPIKRYTGGRIGESWVITEGRRLIPEIFQWSAVLSVCLGWPGAVYFFSKARKA
PDB seq: ---------------------GRIGESWVITEGRRLIPEIFQWSAVLSVCLGWPGAVYFFSKARKA
                              --------+---------+---------+---------+------
                                     30        40        50        60