>5xt5D (D:) observed residues (from ATOM records)
nldtlyrqvimdhyknprnkgvlndsivvdmnnptcgdrirltmkldgdivedakfegeg
csismasasmmtqaikgkdietalsmskifsdmmqgkeyddsidlgdiealqgvskfpar
ikcatlswkalekgvak