Chains and heterogens:
PDB Chain Sequences:
>5k42A (A:) smadrgdsgdsdfvvvanrlpidlerapdgttswkrspgglvtalepllrrrrgawigwp gipdsdedpivdgdlvlypvrlsaddvaqyyegfsnatlwplyhdvivkpiynrqwwery vevnrrfaeatsraaargatvwvqdyqlqlvpkmlrelrpdltigfflhipfppvelfmq lpwrteitdgllgadlvgfhlpggaqnflflarrlvgantsrasvgvrskfgevqigsrt vkvgafpisidsadldrqarqrsirqrarqiraelgnprrillgvdrldytkgidvrlqa faellaegrvnredtvfvqlatpsrerveayrllrddierqvghingeygevghpvvhyl hrpvpreeliaffvaadvmlvtplrdgmnlvakeyvacrsdlggalvlseftgaaaelgq aylvnphnldhvkdtmvaalnqtpeegrrrmralrrqvlahdvdlwarsfldalastrtg dadavpv
>5k42A (A:) gdsdfvvvanrlpidlwkrspgglvtalepllrrrrgawigwpgipdsdedpivdgdlvl ypvrlsaddvaqyyegfsnatlwplyhdvivkpiynrqwweryvevnrrfaeatsraaar gatvwvqdyqlqlvpkmlrelrpdltigfflhipfppvelfmqlpwrteitdgllgadlv gfhlpggaqnflflarrlvgantsrasvgvrskfgevqigsrtvkvgafpisidsadldr qarqrsirqrarqiraelgnprrillgvdrldytkgidvrlqafaellaegrvnredtvf vqlatpsrerveayrllrddierqvghingeygevghpvvhylhrpvpreeliaffvaad vmlvtplrdgmnlvakeyvacrsdlggalvlseftgaaaelgqaylvnphnldhvkdtmv aalnqtpeegrrrmralrrqvlahdvdlwarsfldalastr