>4itxB (B:) observed residues (from ATOM records)
kkldtqlvnagrskkytlgavnsviqrasslvfdsveakkhatrnrangelfygrrgtlt
hfslqqamceleggagcvlfpcgaaavansilafieqgdhvlmtntayessqdfcskils
klgvttswfdpligadivkhlqpntkivflespgsitmevhdvpaivaavrsvvpdaiim
idntwaagvlfkaldfgidvsiqaatkylvghsdamigtavcnarcweqlrenaylmgqm
vdadtayitsrglrtlgvrlrqhhesslkvaewlaehpqvarvnhpalpgskghefwkrd
ftgssglfsfvlkkklnneelanyldnfslfsmayswggyeslilanqpehiaairpqge
idfsgtlirlhigledvddliadldagfariv