Chains and heterogens:
PDB Chain Sequences:
>1us3A (A:) mvaasegnvvievdmangwrgnasgstshsgitysadgvtfaalgdgvgavfdiarpttl edaviamvvnvsaefkaseanlqifaqlkedwskgewdclaasseltadtdltltctide dddkfnqtardvqvgiqakgtpagtitiksvtitlaqeaysanvdhlrdlapsdfpigva vsntdsatynlltnsreqavvkkhfnhltagnimkmsymqptegnfnftnadafvdwate nnmtvhghalvwhsdyqvpnfmknwagsaedflaaldthittivdhyeakgnlvswdvvn eaiddnspanfrttdsafyvksgnssvyierafqtaraadpavilyyndynieqnnaktt kmvdmvkdfqarsipidgvgfqmhvcmnypsianisaamkkvvdlgllvkiteldvavnq phcdaypankinplteaaqlaqkkrycdvvkayldtvpvnqrggisvwgttdantwldgl yreqfedekiswpllfdnnyndkpalrgfadaligtqctnthelhhhhhh
>1us3A (A:) dmangwrgnasgstshsgitysadgvtfaalgdgvgavfdiamvvnvsaefkaseanlqi faqlkedwskewdclaasseltdltltctkfnqtdvqvgiqakgtpagtitiksvtitay sanvdhlrdlapsdfpigvavsntdsatynlltnsreqavvkkhfnhltagnimkmsymq ptegnfnftnadafvdwatennmtvhghalvwhsdyqvpnfmknwagsaedflaaldthi ttivdhyeakgnlvswdvvneaiddnspanfrttdsafyvksgnssvyierafqtaraad pavilyyndynieqnnakttkmvdmvkdfqarsipidgvgfqmhvcmnypsianisaamk kvvdlgllvkiteldvavnqphcdaypankinplteaaqlaqkkrycdvvkayldtvpvn qrggisvwgttdantwldglyreqfedekiswpllfdnnyndkpalrgfadaligtqctn th