Chains and heterogens:
PDB Chain Sequences:
>1dkxA (A:) vllldvtplslgietmggvmttliaknttiptkhsqvfstaednqsavtihvlqgerkra adnkslgqfnldginpaprgmpqievtfdidadgilhvsakdknsgkeqkitikassgln edeiqkmvrdaeanaeadrkfdelvqtrnqgdhllhstrkqveeagdklpaddktaiesa ltaletalkgedkaaieakmqelaqvsqklmeiaqqqha