Chains and heterogens:
PDB Chain Sequences:
>1x8xA (A:) massnlikqlqerglvaqvtdeealaerlaqgpialycgfdptadslhlghlvpllclkr fqqaghkpvalvggatgligdpsfkaaerklnteetvqewvdkirkqvapfldfdcgens aiaannydwfgnmnvltflrdigkhfsvnqminkeavkqrlnredqgisftefsynllqg ydfaclnkqygvvlqiggsdqwgnitsgidltrrlhqnqvfgltvplitkadgtkfgkte ggavwldpkktspykfyqfwintadadvyrflkfftfmsieeinaleeedknsgkapraq yvlaeqvtrlvhgeeglqaakr