>1y23C (C:) observed residues (from ATOM records)
encifckiiagdipsakvyedehvlafldisqvtkghtlvipkthienvyeftdelakqy
fhavpkiarairdefepiglntlnnngekagqsvfhyhmhiiprygkgdgfgavwkthad
dykpedlqnisssiakrl