Chains and heterogens:
PDB Chain Sequences:
>1xr4A (A:) snamketvtmlnqqyvvpeglqpyqgvtanspwlasetekrrrkicdsleeairrsglkn gmtisfhhafrggdkvvnmvmaklaemgfrdltlassslidahwpliehikngvvrqiyt sglrgklgeeisaglmenpvqihshggrvkliqsgelnidvaflgvpccdefgnangfsg ksrcgslgyaqvdaqyakcvvllteewvefpnypasiaqdqvdlivqvdevgdpekitag airlssnprelliarqaanviehsgyfcdgfslqtgtggaslavtrfledkmrrhnitas fglggitgtmvdlhekglikalldtqsfdgdaarslaqnphhieistnqyanpaskgaac erlnvvmlsaleidvnfnvnvmtgsngvlrgasgghsdtaagadltiitaplvrgripcv vekvlttvtpgasvdvlvtdhgiavnparqdlldnlraagvalmtieqlqqraeqltgkp qpieftdrvvavvryrdgsvidvirqvkg
>1xr4A (A:) amketvtmlnqqyvvpeglqpyqgvtanspwlasetekrrrkicdsleeairrsglkngm tisfhhafrggdkvvnmvmaklaemgfrdltlassslidahwpliehikngvvrqiytsg lrgklgeeisaglmenpvqihshggrvkliqsgelnidvaflgvpccdefgnangfsgks rcgslgyaqvdaqyakcvvllteewvefpnypasiaqdqvdlivqvdevgdpekitagai rlssnprelliarqaanviehsgyfcdgfslqtgtggaslavtrfledkmrrhnitasfg lggitgtmvdlhekglikalldtqsfdgdaarslaqnphhieistnqyanpaskgaacer lnvvmlsaleidvnfnvnvmtgsngvlrgasgghsdtaagadltiitaplvrgripcvve kvlttvtpgasvdvlvtdhgiavnparqdlldnlraagvalmtieqlqqraeqltgkpqp ieftdrvvavvryrdgsvidvirqvk
>1xr4B (B:) snamketvtmlnqqyvvpeglqpyqgvtanspwlasetekrrrkicdsleeairrsglkn gmtisfhhafrggdkvvnmvmaklaemgfrdltlassslidahwpliehikngvvrqiyt sglrgklgeeisaglmenpvqihshggrvkliqsgelnidvaflgvpccdefgnangfsg ksrcgslgyaqvdaqyakcvvllteewvefpnypasiaqdqvdlivqvdevgdpekitag airlssnprelliarqaanviehsgyfcdgfslqtgtggaslavtrfledkmrrhnitas fglggitgtmvdlhekglikalldtqsfdgdaarslaqnphhieistnqyanpaskgaac erlnvvmlsaleidvnfnvnvmtgsngvlrgasgghsdtaagadltiitaplvrgripcv vekvlttvtpgasvdvlvtdhgiavnparqdlldnlraagvalmtieqlqqraeqltgkp qpieftdrvvavvryrdgsvidvirqvkg
>1xr4B (B:) amketvtmlnqqyvvpeglqpyqgvtanspwlasetekrrrkicdsleeairrsglkngm tisfhhafrggdkvvnmvmaklaemgfrdltlassslidahwpliehikngvvrqiytsg lrgklgeeisaglmenpvqihshggrvkliqsgelnidvaflgvpccdefgnangfsgks rcgslgyaqvdaqyakcvvllteewvefpnypasiaqdqvdlivqvdevgdpekitagai rlssnprelliarqaanviehsgyfcdgfslqtgtggaslavtrfledkmrrhnitasfg lggitgtmvdlhekglikalldtqsfdgdaarslaqnphhieistnqyanpaskgaacer lnvvmlsaleidvnfnvnvmtgsngvlrgasgghsdtaagadltiitaplvrgripcvve kvlttvtpgasvdvlvtdhgiavnparqdlldnlraagvalmtieqlqqraeqltgkpqp ieftdrvvavvryrdgsvidvirqvk