>3j39F (F:) observed residues (from ATOM records)
fskkqiskrvaeskrrlkkaavialrkkenlvraekyqneyikaeqreiklrrlakkrnq
fyvpaeaklafvvrirginkvapkvrkvlqlfrlrqinngvfiklnkatinmlriaepyi
twgypnlksvreliykrgfvkhnrqrvpitdnfvierklrqahqiqcvedlvheiftvgp
nfkyasnflwpfklntptggwrkkanhyvnggdfgnredqinrllrkmv