Chains and heterogens:
PDB Chain Sequences:
>1a7kA (A:) apikvgingfgrigrmvfqaicdqgligteidvvavvdmstnaeyfayqmkhdtvhgrpk ytveavksspsvetadvlvvnghrikcvkaqrnpadlpwgklgvdyviestglftdklka eghikggakkvvisapasggaktivmgvnqheyspashhvvsnascttnclapivhvltk enfgietglmttihsytatqktvdgvslkdwrggraaavniipsttgaakavgmvipstk gkltgmsfrvptpdvsvvdltfratrdtsiqeidkaikkaaqtymkgilgftdeelvsad findnrssvydskatlqnnlpgekrffkvvswydnewayshrvvdlvrymaakdaass
>1a7kB (B:) apikvgingfgrigrmvfqaicdqgligteidvvavvdmstnaeyfayqmkhdtvhgrpk ytveavksspsvetadvlvvnghrikcvkaqrnpadlpwgklgvdyviestglftdklka eghikggakkvvisapasggaktivmgvnqheyspashhvvsnascttnclapivhvltk enfgietglmttihsytatqktvdgvslkdwrggraaavniipsttgaakavgmvipstk gkltgmsfrvptpdvsvvdltfratrdtsiqeidkaikkaaqtymkgilgftdeelvsad findnrssvydskatlqnnlpgekrffkvvswydnewayshrvvdlvrymaakdaass
>1a7kC (C:) apikvgingfgrigrmvfqaicdqgligteidvvavvdmstnaeyfayqmkhdtvhgrpk ytveavksspsvetadvlvvnghrikcvkaqrnpadlpwgklgvdyviestglftdklka eghikggakkvvisapasggaktivmgvnqheyspashhvvsnascttnclapivhvltk enfgietglmttihsytatqktvdgvslkdwrggraaavniipsttgaakavgmvipstk gkltgmsfrvptpdvsvvdltfratrdtsiqeidkaikkaaqtymkgilgftdeelvsad findnrssvydskatlqnnlpgekrffkvvswydnewayshrvvdlvrymaakdaass
>1a7kD (D:) apikvgingfgrigrmvfqaicdqgligteidvvavvdmstnaeyfayqmkhdtvhgrpk ytveavksspsvetadvlvvnghrikcvkaqrnpadlpwgklgvdyviestglftdklka eghikggakkvvisapasggaktivmgvnqheyspashhvvsnascttnclapivhvltk enfgietglmttihsytatqktvdgvslkdwrggraaavniipsttgaakavgmvipstk gkltgmsfrvptpdvsvvdltfratrdtsiqeidkaikkaaqtymkgilgftdeelvsad findnrssvydskatlqnnlpgekrffkvvswydnewayshrvvdlvrymaakdaass