Chains and heterogens:
PDB Chain Sequences:
>4dwwA (A:) aqsvpygisqikapalhsqgytgsnvkvavidsgidsshpdlnvrggasfvpsetnpyqd gsshgthvagtiaalnnsigvlgvapsaslyavkvldstgsgqyswiingiewaisnnmd vinmslggptgstalktvvdkavssgivvaaaagnegssgststvgypakypstiavgav nssnqrasfssvgseldvmapgvsiqstlpggtygayngtsmatphvagaaalilskhpt wtnaqvrdrlestatylgnsfyygkglinvqaaaq