>1yf3B (B:) observed residues (from ATOM records)
mlgaiaytgnkqsllpelkshfpkynrfvdlfcgglsvslnvngpvlandiqepiiemyk
rlinvswddvlkvikqyklsktskeeflklredynktrdplllyvlhfhgfsnmirinyk
gnfttpfgkrtinknsekrfnhfkqncdkiifsslhfkdvkildgdfvyvdppylitvad
ynkfwsedeekdllnlldslndrgikfglsnvlehhgkentllkewskkynvkhlnkkkn
gtdevyifn