Chains and heterogens:
PDB Chain Sequences:
>1ste_ (-) esqpdptpdelhksseftgtmgnmkylyddhyvsatkvmsvdkflahdliynisdkklkn ydkvktellnedlakkykdevvdvygsnyyvncyfsskdnvgkvtggktcmyggitkheg nhfdngnlqnvlirvyenkrntisfevqtdkksvtaqeldikarnflinkknlyefnssp yetgyikfienngntfwydmmpapgdkfdqskylmmyndnktvdsksvkievhlttkn