Chains and heterogens:
PDB Chain Sequences:
>1istA (A:) msqvyfdveadgqpigrvvfklyndivpktaenfralctgekgfgyagspfhrvipdfml qggdftagngtggksiyggkfpdenfkkhhdrpgllsmanagpntngsqffittvpcpwl dgkhvvfgevvdgydivkkveslgspsgatkarivvaksgel
>1istA (A:) sqvyfdveadgqpigrvvfklyndivpktaenfralctgekgfgyagspfhrvipdfmlq ggdftagngtggksiyggkfpdenfkkhhdrpgllsmanagpntngsqffittvpcpwld gkhvvfgevvdgydivkkveslgspsgatkarivvaksgel
>1istB (B:) msqvyfdveadgqpigrvvfklyndivpktaenfralctgekgfgyagspfhrvipdfml qggdftagngtggksiyggkfpdenfkkhhdrpgllsmanagpntngsqffittvpcpwl dgkhvvfgevvdgydivkkveslgspsgatkarivvaksgel
>1istB (B:) sqvyfdveadgqpigrvvfklyndivpktaenfralctgekgfgyagspfhrvipdfmlq ggdftagngtggksiyggkfpdenfkkhhdrpgllsmanagpntngsqffittvpcpwld gkhvvfgevvdgydivkkveslgspsgatkarivvaksgel