Chains and heterogens:
PDB Chain Sequences:
>1ejnA (A:) iiggefttienqpwfaaiyrrhrggsvtyvcggslispcwvisathcfidypkkedyivy lgrsrlnsntqgemkfevenlilhkdysadtlahhndiallkirskegrcaqpsrtiqti slpsmyndpqfgtsceitgfgkenstdylypeqlkmtvvklishrecqqphyygsevttk mlcaadpqwktdscqgdsggplvcslqgrmtltgivswgrgcalkdkpgvytrvshflpw irshtke