Chains and heterogens:
PDB Chain Sequences:
>1ko2A (A:) eyptvseipvgevrlyqiadgvwshiatqsfdgavypsnglivrdgdelllidtawgakn taallaeiekqiglpvtravsthfhddrvggvdvlraagvatyaspstrrlaevegneip thsleglsssgdavrfgpvelfypgaahstdnlvvyvpsasvlyggcaiyelsrtsagnv adadlaewptsieriqqhypeaqfvipghglpggldllkhttnvvkahtn