Chains and heterogens:
PDB Chain Sequences:
>1i1xA (A:) eaaqsvdqlikargkvyfgvatdqnrlttgknaaiiqanfgqvtpensmkwdatepsqgn fnfagadylvnwaqqngklirghtlvwhsqlpswvssitdkntltnvmknhittlmtryk gkirawdvvneafnedgslrqtvflnvigedyipiafqtaraadpnaklyindynldsas ypktqaivnrvkkwraagvpidgigsqthlsagqgasvlqalpllasagtpevaiteldv agasstdyvnvvnaclnvsscvgitvwgvadpdswrasttpllfdgnfnpkpaynaivqn lq