>4is2A (A:) observed residues (from ATOM records)
mnlvqdkvtiitggtrgigfaaakifidngakvsifgetqeevdtalaqlkelypeeevl
gfapdltsrdavmaavgqvaqkygrldvminnagitsnnvfsrvseeefkhimdinvtgv
fngawcayqcmkdakkgviintasvtgifpaskasviglthglgreiirknirvvgvapg
vvntmlepeeianvylflasdlasgitattvsvdg