Chains and heterogens:
PDB Chain Sequences:
>1e4aP (P:) mernklarqiidtclemtrlglnqgtgnvsvryqdgmlitptgipyeklteshivfidgn gkheegklpssewrfhmaayqsrpdanavvhnhavhctavsilnrsipaihymiaaaggn sipcapyatfgtrelsehvalalknrkatllqhhgliacevnlekalwlahevevlaqly lttlaitdpvpvlsdeeiavvlekf