Chains and heterogens:
PDB Chain Sequences:
>1bwkA (A:) sfvkdfkpqalgdtnlfkpikignnellhravippltrmralhpgnipnrdwaveyytqr aqrpgtmiitegafispqaggydnapgvwseeqmvewtkifnaihekksfvwvqlwvlgw aafpdnlardglrydsasdnvfmdaeqeakakkannpqhsltkdeikqyikeyvqaakns iaagadgveinsangyllnqfldphsntrtdeyggsienrarftlevvdalveaighekv glrlspygvfnsmsggaetgivaqyayvagelekrakagkrlafvhlveprvtnpflteg egeyeggsndfvysiwkgpviragnfalhpevvreevkdkrtligygrffisnpdlvdrl ekglplnkydrdtfyqmsahgyidyptyeealklgwdks