>4d1sA (A:) observed residues (from ATOM records)
tqfeerhlkflqqlgkgfgsvemcrydplqdntgevvavkklqhsteehlrdfereieil
kslqhdnivkykgvcysagrrnlklimeylpygslrdylqkhkeridhikllqytsqick
gmeylgtkryihrdlatrnilvenenrvkigdfgltkvlpqdkeyykvspifwyapeslt
eskfsvasdvwsfgvvlyelftyiesksppaefmrmigndkqgqmivfhliellknngrl
prpdgcpdeiymimtecwnnnvnqrpsfrdlalrvdqirdnm