>1b5lA (A:) observed residues (from ATOM records)
cylsrklmldarenlklldrmnrlsphsclqdrkdfglpqemvegdqlqkdqafpvlyem
lqqsfnlfytehssaawdttlleqlctglqqqldhldtcrgmdpivtvkkyfqgiydylq
ekgysdcaweivrvemmraltvsttlqkrltk