>2a1tS (S:) observed residues (from ATOM records)
elrvlvavkrvidyavkirvkpdrtgvvtdgvkhsmnpfceiaveeavrlkekklvkevi
avscgpaqcqetirtalamgadrgihvevppaeaerlgplqvarvlaklaekekvdlvll
gkqaidddcnqtgqmtagfldwpqgtfasqvtlegdklkveraidggletlrlklpavvt
adlrlnepryatlpnimkakkkkievikpgdlgvdltsklsvisvedppttedlvaklk