>2r27A (A:) observed residues (from ATOM records)
atkavavlkgdgpvqgiinfeqkesngpvkvwgsikglteglhgfhvhefgdntagctsa
gphfnplrsvgslgnvtadkdgvadvsiedsvislsgdhsiigrtlvvhekaddlgkggn
agsrlacgvigiaq