Chains and heterogens:
PDB Chain Sequences:
>1k3aA (A:) vpdewevarekitmsrelgqgsfgmvyegvakgvvkdepetrvaiktvneaasmrerief lneasvmkefnchhvvrllgvvsqgqptlvimelmtrgdlksylrslrpemennpvlapp slskmiqmageiadgmaylnankfvhrdlaarncmvaedftvkigdfgmtrdiyetdyyr kggkgllpvrwmspeslkdgvfttysdvwsfgvvlweiatlaeqpyqglsneqvlrfvme gglldkpdncpdmllelmrmcwqynpkmrpsfleiissikeemepgfrevsfyyseenk
>1k3aA (A:) vpdewevarekitmsrelgqgsfgmvyegvakgvvkdepetrvaiktvneaasmrerief lneasvmkefnchhvvrllgvvsqgqptlvimelmtrgdlksylrslrpempslskmiqm ageiadgmaylnankfvhrdlaarncmvaedftvkigdfgmtrdiyetdyyrkggkgllp vrwmspeslkdgvfttysdvwsfgvvlweiatlaeqpyqglsneqvlrfvmegglldkpd ncpdmllelmrmcwqynpkmrpsfleiissikeemepgfrevsfyyseenk