Chains and heterogens:
PDB Chain Sequences:
>1sn7A (A:) aaptaytpldvaqayqfpegldgqgqciaiielgggydeaslaqyfaslgvpapqvvsvs vdgasnqptgdpsgpdgeveldievagalapgakfavyfapntdagfldaittaihdptl kpsvvsiswggpedswtsaaiaamnrafldaaalgvtvlaaagdsgstdgeqdglyhvdf paaspyvlacggtrlvasggriaqetvwndgpdggatgggvsrifplpawqehanvppsa npgassgrgvpdlagnadpatgyevvidgeatviggtsavaplfaalvarinqklgkavg ylnptlyqlpadvfhditegnndianraqiyqagpgwdpctglgspigvrllqallpsas qpqp
>1sn7A (A:) taytpldvaqayqfpegldgqgqciaiielgggydeaslaqyfaslgvpapqvvsvsvdg asnqptgdpsgpdgeveldievagalapgakfavyfapntdagfldaittaihdptlkps vvsiswggpedswtsaaiaamnrafldaaalgvtvlaaagdsgstdgeqdglyhvdfpaa spyvlacggtrlvasggriaqetvwndgpdggatgggvsrifplpawqehanvppsanpg assgrgvpdlagnadpatgyevvidgeatviggtsavaplfaalvarinqklgkavgyln ptlyqlpadvfhditegnndianraqiyqagpgwdpctglgspigvrllqallps