>3rs7A (A:) observed residues (from ATOM records)
mteyklvvvgaggvgksaltiqliqnhfvdeydptiedsyrkqvvidgetclldildtag
qeeyrdqymrtgegflcvfainntksfedihqyreqikrvkdsddvpmvlvgnkcdlaar
tvesrqaqdlarsygipyietsaktrqgvedafytlvreirqh