Chains and heterogens:
PDB Chain Sequences:
>1d3aA (A:) tkvsvvgaagtvgaaagynialrdiadevvfvdipdkeddtvgqaadtnhgiaydsntrv rqggyedtagsdvvvitagiprqpgqtridlagdnapimediqssldehnddyislttsn pvdllnrhlyeagdrsreqvigfggrldsarfryvlseefdapvqnvegtilgehgdaqv pvfskvrvdgtdpefsgdekeqllgdlqesamdvierkgatewgpargvahmveailhdt gevlpasvklegefghedtafgvpvrlgsngveeivewdlddyeqdlmadaaeklsdqyd kis
>1d3aB (B:) tkvsvvgaagtvgaaagynialrdiadevvfvdipdkeddtvgqaadtnhgiaydsntrv rqggyedtagsdvvvitagiprqpgqtridlagdnapimediqssldehnddyislttsn pvdllnrhlyeagdrsreqvigfggrldsarfryvlseefdapvqnvegtilgehgdaqv pvfskvrvdgtdpefsgdekeqllgdlqesamdvierkgatewgpargvahmveailhdt gevlpasvklegefghedtafgvpvrlgsngveeivewdlddyeqdlmadaaeklsdqyd kis