Chains and heterogens:
PDB Chain Sequences:
>1a7aA (A:) sdklpykvadiglaawgrkaldiaenempglmrmrerysaskplkgariagclhmtveta vlietlvtlgaevqwsscnifstqnhaaaaiakagipvyawkgetdeeylwcieqtlyfk dgplnmilddggdltnlihtkypqllpgirgiseetttgvhnlykmmangilkvpainvn dsvtkskfdnlygcreslidgikratdvmiagkvavvagygdvgkgcaqalrgfgarvii teidpinalqaamegyevttmdeacqegnifvtttgcidiilgrhfeqmkddaivcnigh fdveidvkwlnenavekvnikpqvdryrlkngrriillaegrlvnlgcamghpsfvmsns ftnqvmaqielwthpdkypvgvhflpkkldeavaeahlgklnvkltkltekqaqylgmsc dgpfkpdhyry
>1a7aB (B:) dklpykvadiglaawgrkaldiaenempglmrmrerysaskplkgariagclhmtvetav lietlvtlgaevqwsscnifstqnhaaaaiakagipvyawkgetdeeylwcieqtlyfkd gplnmilddggdltnlihtkypqllpgirgiseetttgvhnlykmmangilkvpainvnd svtkskfdnlygcreslidgikratdvmiagkvavvagygdvgkgcaqalrgfgarviit eidpinalqaamegyevttmdeacqegnifvtttgcidiilgrhfeqmkddaivcnighf dveidvkwlnenavekvnikpqvdryrlkngrriillaegrlvnlgcamghpsfvmsnsf tnqvmaqielwthpdkypvgvhflpkkldeavaeahlgklnvkltkltekqaqylgmscd gpfkpdhyry