>3l72O (O:) observed residues (from ATOM records)
cpgaedleitklpngliiaslenfspasrigvfikagsryettanlgtahllrlaspltt
kgassfritrgieavggslsvystrekmtycveclrdhvdtvmeyllnvttapefrpwev
tdlqpqlkvdkavafqspqvgvlenlhaaayktalanplycpdyrigkitseqlhhfvqn
nftsarmalvgigvkhsdlkqvaeqflnirsgagtssakatywggeireqnghslvhaav
vtegaavgsaeanafsvlqhvlgagplikrgssvtsklyqgvakattqpfdasafnvnys
dsglfgfytisqaahageviraamnqlkaaaqggvteedvtkaknqlkatylmsvetaqg
llneigseallsgthtapsvvaqkidsvtsadvvnaakkfvsgkksmaasgdlgstpfld
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