>4twlB (B:) observed residues (from ATOM records)
efsyidgnpngpenwgnlkpewetcgkgmeqspiqlrdnrvifdqtlgklrrnyravdar
lrnsghdvlvdfkgnagslsinrveyqlkrihfhspsehemngerfdleaqlvhesqdqk
ravvsilfrfgradpflsdledfikqfsnsqkneinagvvdpnqlqiddsayyrymgsft
appctegiswtvmrkvatvsprqvlllkqavnenainnarplqptnfrsvfyfeql