Chains and heterogens:
PDB Chain Sequences:
>1sayA (A:) meigvpkeiknqefrvglspssvrtlveaghtvfietqagigagfadqdyvqagaqvvps akdawsremvvkvkeplpaeydlmqkdqllftylhlaaarelteqlmrvgltaiayetve lpnrslplltpmsiiagrlsvqfgarflerqqggrgvllggvpgvkpgkvvilgggvvgt eaakmavglgaqvqifdinverlsyletlfgsrvellysnsaeietavaeadlligavlv pgrrapilvpaslveqmrtgsvivdvavdqggcvetlhptshtqptyevfgvvhygvpnm pgavpwtatqalnnstlpyvvklanqglkaletddalakglnvqahrlvhpavqqvfpdl a