>4frrC (C:) observed residues (from ATOM records)
dklhsqanlmrlksdlfnrspypgptkddpltvtlgftlqdivkadsstnevdlvyyeqq
rwklnslmwdpneygnitdfrtsaadiwtpditaysstrpvqvlspqiavvthdgsvmfi
paqrlsfmcdptgvdseegatcavkfgswvysgfeidlktdtdqvdlssyyasskyeils
atqtrqvqhysccpepyidvnlvvkfrerr