>1tu3A (A:) observed residues (from ATOM records)
icqfklvllgesavgksslvlrfvkgqfhefqestigaafltqtvclddttvkfeiwdta
gqeryhslapmyyrgaqaaivvyditneesfaraknwvkelqrqaspnivialsgnkadl
ankravdfqeaqsyaddnsllfmetsaktsmnvneifmaiakklp