>1ix4A (A:) observed residues (from ATOM records)
qdlsealkeatkevhiraensefmrnfqkgqvsregfklvmaslyhiytaleeeiernkq
npvyaplyfpeelhrraaleqdmafwygphwqeaipytpatqhyvkrlhevggthpellv
ahaytrylgdlsggqvlkkiaqkamalpssgeglafftfpsidnptkfkqlyrarmntle
mtpevkhrvteeaktafllnielfeelqallt