Sequence alignment between 3s3a(C) and UniProt seq P82543 (COXA_THET8):

P82543 (COXA_THET8): Cytochrome c oxidase polypeptide 2A from Thermus thermophilus (strain ATCC 27634 / DSM 579 / HB8) 
                 10        20        30    
         ---------+---------+---------+----
UniProt: MEEKPKGALAVILVLTLTILVFWLGVYAVFFARG
PDB seq: -EEKPKGALAVILVLTLTILVFWLGVYAVFFARG
          --------+---------+---------+----
                 10        20        30