Chains and heterogens:
PDB Chain Sequences:
>1ck1A (A:) esqpdpmpddlhksseftgtmgnmkylyddhyvsatkvksvdkflahdliynindkklnn ydkvktellnedlankykdevvdvygsnyyvncyfsskdnvgkvtsgktcmyggitkheg nhfdngnlqnvlirvyenkrntisfevqtdkksvtaqeldikarnflinkknlyefnssp yetgyikfiesngntfwydmmpapgdkfdqskylmiykdnkmvdsksvkievhlttkng