Chains and heterogens:
PDB Chain Sequences:
>6f4cB (B:) lsnglgrtpqmgwsswnhfacnieekeiretadamvstglaslgyeyiniddcwaelnrd sqgnmvpkgstfpsgikaladyvhskglklgiysdagsqtcskqmtgslgheeqdaktfa swgvdylkydncnnenrsprerypimakalknsgraifyslcewgdddpatwassvgnsw rttgdisdnwdsmtsradmndewasyagpggwndpdmlevgnggmttaeyrshfsiwala kapliigcdlrsmdqtaheilsnkeviavnqdklgvqgkkvkqngdlevwagplsgkrva lvlwnrssskaditaywsdigldsstvvdardlwahstkgsvkgqisasidshdcrmyvl tpk