>1xfsA (A:) observed residues (from ATOM records)
idaeldlmlkrelavpvnlvwrgltepellkkwfvpkpwsisdcrvdlrpggefytvmqd
pegnkfpnsgcflevtdekrliwtsalvknyrpavpvmtavielqptssgtrytacamhn
tpgqrklheemgfhegwgttitqleellkqekay