Chains and heterogens:
PDB Chain Sequences:
>6cupA (A:) gmteyklvvvgaggvgksaltiqliqnhfvdeydptiedsyrkqvvidgetclldildta gqeeasamrdqymrtgegflcvfainntksfedihqyreqikrvkdsddvpmvlvgnkcd laartvesrqaqdlarsygipyietsaktrqgvedafytlvreirqh
>6cupA (A:) mteyklvvvgaggvgksaltiqliqnhfvdeydptiedsyrkqvvidgetclldildtag qeeasamrdqymrtgegflcvfainntksfedihqyreqikrvkdsddvpmvlvgnkcdl aartvesrqaqdlarsygipyietsaktrqgvedafytlvreirqh
>6cupB (B:) gqmrlpsadvyrfaepdseeniifeenmqpkagipiikagtviklierltyhmyadpnfv rtflttyrsfckpqellsliierfeipepepteadriaiengdqplsaelkrfrkeyiqp vqlrvlnvcrhwvehhfydferdayllqrmeefigtvrgkamkkwvesitkiiqrkkiar dngpghnitfqsspptvewhisrpghietfdlltlhpieiarqltllesdlyravqpsel vgsvwtkedkeinspnllkmirhttnltlwfekcivetenleervavvsriieilqvfqe lnnfngvlevvsamnsspvyrldhtfeqipsrqkkileeahelsedhykkylaklrsinp pcvpffgiyltnilkteegnpevlkrhgkelinfskrrkvaeitgeiqqyqnqpyclrve sdikrffenlnpmgnsmekeftdylfnksleieprnpkplprfpkkysyplkspgvrpsn pr
>6cupB (B:) gqmrlpsadvyrfaepdseeniifeegipiikagtviklierltyhmyadpnfvrtfltt yrsfckpqellsliierfeipepepteadriaiengdqplsaelkrfrkeyiqpvqlrvl nvcrhwvehhfydferdayllqrmeefigtvrgkamkkwvesitkiiqrkkianitfqss pptvewhisrpghietfdlltlhpieiarqltllesdlyravqpselvgsvwtkedkein spnllkmirhttnltlwfekcivetenleervavvsriieilqvfqelnnfngvlevvsa mnsspvyrldhtfeqipsrqkkileeahelsedhykkylaklrsinppcvpffgiyltni lkteegnpevlkrhgkelinfskrrkvaeitgeiqqyqnqpyclrvesdikrffenlnpm gnsmekeftdylfnksleieprnpkplprfpkkysyplkspgvrpsnpr
>6cupC (C:) gmteyklvvvgaggvgksaltiqliqnhfvdeydptiedsyrkqvvidgetclldildta gqeeysamrdqymrtgegflcvfainntksfedihqyreqikrvkdsddvpmvlvgnkcd laartvesrqaqdlarsygipyietsaktrqgvedafytlvreirqh