Chains and heterogens:
PDB Chain Sequences:
>4k7yA (A:) msfvkdfkpqalgdtnlfkpikignnellhravippltrmralhpgnipnrdwaveyytq raqrpgtmiitegafispqaggydnapgvwseeqmvewtkifnaihekksfvwvqltvlg waafpdnlardglrydsasdnvfmdaeqeakakkannpqhsltkdeikqyikeyvqaakn siaagadgveihsangyllnqfldphsntrtdeyggsienrarftlevvdalveaighek vglrlspygvfnsmsggaetgivaqyayvagelekrakagkrlafvhlveprvtnpflte gegeyeggsndfvysiwkgpviragnfalhpevvreevkdkrtligygrffisnpdlvdr lekglplnkydrdtfyqmsahgyidyptyeealklgwdkk
>4k7yA (A:) sfvkdfkpqalgdtnlfkpikignnellhravippltrmralhpgnipnrdwaveyytqr aqrpgtmiitegafispqaggydnapgvwseeqmvewtkifnaihekksfvwvqltvlgw aafpdnlardglrydsasdnvfmdaeqeakakkannpqhsltkdeikqyikeyvqaakns iaagadgveihsangyllnqfldphsntrtdeyggsienrarftlevvdalveaighekv glrlspygvfnsmsggaetgivaqyayvagelekrakagkrlafvhlveprvtnpflteg egeyeggsndfvysiwkgpviragnfalhpevvreevkdkrtligygrffisnpdlvdrl ekglplnkydrdtfyqmsahgyidyptyeealklgwdkk