Chains and heterogens:
PDB Chain Sequences:
>3r7kA (A:) gpgsmtdagtttasedgaarfvvapeawttperralsqmarsfvereiapklaewehvge iprdlhlnaaevgllgigfpeevggsggnaidsalvteailaaggstgvcaalfthgial phiaangsdalieryvrptlagkmigslgvtepgagsdvanlrtravregdtyvvngakt fitsgvradfvttavrtggpgyggvsllvidknspgfevsrrldkmgwrcsdtaelsfvd vrvpadnlvgaensgflqimqqfqaerlgiavqayatagraldlakswareretfgrplt grqiirhklaemarqvdvactytravmqrwlagedvvaevsmakntavyacdyvvneavq ifggmgymreseierhyrdcrilgigggtneimneviakrigl
>3r7kA (A:) peawttperralsqmarsfvereiapklaewehvgeiprdlhlnaaevgllgigfpeevg gsggnaidsalvteailaaggstgvcaalfthgialphiaangsdalieryvrptlagkm igslgvtepgagsdvanlrtravregdtyvvngaktfitsgvradfvttavrtggpgygg vsllvidknspgfevsrrldkmgwrcsdtaelsfvdvrvpadnlvgaensgflqimqqfq aerlgiavqayatagraldlakswareretfgrpltgrqiirhklaemarqvdvactytr avmqrwlagedvvaevsmakntavyacdyvvneavqifggmgymreseierhyrdcrilg igggtneimneviakrig
>3r7kB (B:) gpgsmtdagtttasedgaarfvvapeawttperralsqmarsfvereiapklaewehvge iprdlhlnaaevgllgigfpeevggsggnaidsalvteailaaggstgvcaalfthgial phiaangsdalieryvrptlagkmigslgvtepgagsdvanlrtravregdtyvvngakt fitsgvradfvttavrtggpgyggvsllvidknspgfevsrrldkmgwrcsdtaelsfvd vrvpadnlvgaensgflqimqqfqaerlgiavqayatagraldlakswareretfgrplt grqiirhklaemarqvdvactytravmqrwlagedvvaevsmakntavyacdyvvneavq ifggmgymreseierhyrdcrilgigggtneimneviakrigl
>3r7kB (B:) peawttperralsqmarsfvereiapklaewehvgeiprdlhlnaaevgllgigfpeevg gsggnaidsalvteailaaggstgvcaalfthgialphiaangsdalieryvrptlagkm igslgvtepgagsdvanlrtravregdtyvvngaktfitsgvradfvttavrtggpgygg vsllvidknspgfevsrrldkmgwrcsdtaelsfvdvrvpadnlvgaensgflqimqqfq aerlgiavqayatagraldlakswareretfgrpltgrqiirhklaemarqvdvactytr avmqrwlagedvvaevsmakntavyacdyvvneavqifggmgymreseierhyrdcrilg igggtneimneviakrig
>3r7kC (C:) gpgsmtdagtttasedgaarfvvapeawttperralsqmarsfvereiapklaewehvge iprdlhlnaaevgllgigfpeevggsggnaidsalvteailaaggstgvcaalfthgial phiaangsdalieryvrptlagkmigslgvtepgagsdvanlrtravregdtyvvngakt fitsgvradfvttavrtggpgyggvsllvidknspgfevsrrldkmgwrcsdtaelsfvd vrvpadnlvgaensgflqimqqfqaerlgiavqayatagraldlakswareretfgrplt grqiirhklaemarqvdvactytravmqrwlagedvvaevsmakntavyacdyvvneavq ifggmgymreseierhyrdcrilgigggtneimneviakrigl
>3r7kC (C:) awttperralsqmarsfvereiapklaewehvgeiprdlhlnaaevgllgigfpeevggs ggnaidsalvteailaaggstgvcaalfthgialphiaangsdalieryvrptlagkmig slgvtepgagsdvanlrtravregdtyvvngaktfitsgvradfvttavrtggpgyggvs llvidknspgfevsrrldkmgwrcsdtaelsfvdvrvpadnlvgaensgflqimqqfqae rlgiavqayatagraldlakswareretfgrpltgrqiirhklaemarqvdvactytrav mqrwlagedvvaevsmakntavyacdyvvneavqifggmgymreseierhyrdcrilgig ggtneimneviakrigl
>3r7kD (D:) gpgsmtdagtttasedgaarfvvapeawttperralsqmarsfvereiapklaewehvge iprdlhlnaaevgllgigfpeevggsggnaidsalvteailaaggstgvcaalfthgial phiaangsdalieryvrptlagkmigslgvtepgagsdvanlrtravregdtyvvngakt fitsgvradfvttavrtggpgyggvsllvidknspgfevsrrldkmgwrcsdtaelsfvd vrvpadnlvgaensgflqimqqfqaerlgiavqayatagraldlakswareretfgrplt grqiirhklaemarqvdvactytravmqrwlagedvvaevsmakntavyacdyvvneavq ifggmgymreseierhyrdcrilgigggtneimneviakrigl
>3r7kD (D:) awttperralsqmarsfvereiapklaewehvgeiprdlhlnaaevgllgigfpeevggs ggnaidsalvteailaaggstgvcaalfthgialphiaangsdalieryvrptlagkmig slgvtepgagsdvanlrtravregdtyvvngaktfitsgvradfvttavrtggpgyggvs llvidknspgfevsrrldkmgwrcsdtaelsfvdvrvpadnlvgaensgflqimqqfqae rlgiavqayatagraldlakswareretfgrpltgrqiirhklaemarqvdvactytrav mqrwlagedvvaevsmakntavyacdyvvneavqifggmgymreseierhyrdcrilgig ggtneimneviakrig