Chains and heterogens:
PDB Chain Sequences:
>1ck6A (A:) svtcpggqstsnsqccvwfdvlddlqtnfyqgskcespvrkilrivfhdaigfspaltaa gqfggggadgsiiahsnielafpanggltdtiealravginhgvsfgdliqfatavgmsn cpgsprlefltgrsnssqpsppslipgpgntvtaildrmgdagfspdevvdllaahslas qeglnsaifrspldstpqvfdtqfyietllkgttqpgpslgfaeelspfpgefrmrsdal lardsrtacrwqsmtssnevmgqryraamakmsvlgfdrnaltdcsdvipsavsnnaapv ipggltvddievscpsepfpeiatasgplpslapap