>4xk9C (C:) observed residues (from ATOM records)
lhsqanlmrlksdlfnrspmypgptkddpltvtlgftlqdivkadsstnevdlvyyeqqr
wklnslmwdpneygnitdfrtsaadiwtpditaysstrpvqvlspqiavvthdgsvmfip
aqrlsfmcdptgvdseegatcavkfgswvysgfeidlktdtdqvdlssyyasskyeilsa
tqtrqvqhysccpepyidvnlvvkfrerr