Sequence alignment between 6t0b(i) and UniProt seq P07255 (COX9_YEAST):

P07255 (COX9_YEAST): Cytochrome c oxidase subunit 9, mitochondrial from Saccharomyces cerevisiae (strain ATCC 204508 / S288c) 
                 10        20        30        40        50         
         ---------+---------+---------+---------+---------+---------
UniProt: MTIAPITGTIKRRVIMDIVLGFSLGGVMASYWWWGFHMDKINKREKFYAELAERKKQEN
PDB seq: -TIAPITGTIKRRVIMDIVLGFSLGGVMASYWWWGFHMDKINKREKFYAELAERKK---
          --------+---------+---------+---------+---------+------   
                 10        20        30        40        50