Chains and heterogens:
PDB Chain Sequences:
>1e3xA (A:) vngtlmqyfewytpndgqhwkrlqndaehlsdigitavwippaykglsqsdngygpydly dlgefqqkgtvrtkygtkselqdaigslhsrnvqvygdvvlnhkagadatedvtavevnp anrnqetseeyqikawtdfrfpgrgntysdfkwhwyhfdgadwdesrkisrifkfrgegk awdwevssengnydylmyadvdydhpdvvaetkkwgiwyanelsldgfridaakhikfsf lrdwvqavrqatgkemftvaeywqnnagklenylnktsfnqsvfdvplhfnlqaassqgg gydmrkllngtvvskhplksvtfvdnhdtqpgqslestvqtwfkplayafiltresgypq vfygdmygtkgdsqreipalkhkiepilkarkqyaygaqhdyfdhhdivgwtregdssva nsglaalitdgpggakrmyvgrqnagetwhditgnrsepvvinsegwgefhvnggsvsiy vqr