Chains and heterogens:
PDB Chain Sequences:
>3ra4A (A:) dgvgsssgnwhcdstwlgdrvittstrtwalptynnhlykqisngtsggatndntyfgys tpwgyfdfnrfhchfsprdwqrlinnnwgfrpkrlsfklfniqvkevtqnegtktiannl tstiqvftdseyqlpyvlgsahqgclppfpadvfmipqygyltlnngsqavgrssfycle yfpsqmlrtgnnfqftytfedvpfhssyahsqsldrlmnplidqylyylsrtqttggtan tqtlgfsqggpntmanqaknwlpgpcyrqqrvstttgqnnnsnfawtagtkyhlngrnsl anpgiamathkddeerffpsngilifgkqnaardnadysdvmltseeeikttnpvateey givadnlqqqntapqigtvnsqgalpgmvwqnrdvylqgpiwakiphtdgnfhpsplmgg fglkhpppqilikntpvpadppttfnqsklnsfitqystgqvsveiewelqkenskrwnp eiqytsnyykstsvdfavntegvyseprpigtryltrnl