>4y31A (A:) observed residues (from ATOM records)
gifafeneqsstvapaklykaltkdsdeivpkviepiqsveivegnggpgtikkiiaiht
sfvlhkldaideanltynysiiggegldeslekisyeskilpgpdggsigkinvkfhtkg
dvlsetvrdqfkglglfkaiegyvlahpdy