>5k3nA (A:) observed residues (from ATOM records)
aslteiehlvqsvcksyretcqlrledllrqrsnifsreevtgyqrksmwemwercahhl
teaiqyvvefakrlsgfmelcqndqivllkagamevvlvrmcraynadnrtvffegkygg
melfralgcselissifdfshslsalhfsedeialytalvlinahrpglqekrkveqlqy
nlelafhhhlckthrqsilaklppkgklrslcsqhverlqifqhlhpi