Chains and heterogens:
PDB Chain Sequences:
>1xe4A (A:) pvlnlndpqaveryeefmrqspygqvtqdlgwakvmnnwepvdvyleddqgaiiaamsml lgdtptdkkfayaskgpvmdvtdvdlldrlvdeavkaldgrayvlrfdpevaysdefntt lqdhgyvtrnrnvadagmhatiqprlnmvldltkfpdakttldlypsktkskikrpfrdg vevhsgnsateldeffktyttmaerhgithrpieyfqrmqaafdadtmrifvaeregkll stgialkygrkiwymyagsmdgntyyapyavqsemiqwaldtntdlydlggiesestdds lyvfkhvfvkdapreyigeidkvldpevyaelvkd