Chains and heterogens:
PDB Chain Sequences:
>1i4xA (A:) esqpdptpdelhksseftgtmgnmkylyddhyvsatkvmsvdkflahdliynisdkklkn ydkvktellnedlakkykdevvdvygsnyyvncyfsskdnvgkvtggktcmyggitkheg nhfdngnlqnvlirvyenkrntisfevqtdkksvtaqeldikarnflinkknlyefnssp yetgyikfienngntfwydmmpapgdkfdqskylmmyndnktvdsksvkievhlttkng
>1i4xA (A:) esqpdptpdelhksseftgtmgnmkylyddhyvsatkvmsvdkflahdliynisdkklkn ydkvktellnedlakkykdevvdvygsnyyvncyfsskdntggktcmyggitkhegnhfd ngnlqnvlirvyenkrntisfevqtdkksvtaqeldikarnflinkknlyefnsspyetg yikfienngntfwydmmpapgdkfdqskylmmyndnktvdsksvkievhlttkng