Chains and heterogens:
PDB Chain Sequences:
>4rafA (A:) gafldkpkmekhnaqgqgnglryglssmqgwrvemeaahtaviglpsgleswsffavydg hagsqvakyccehlldhitnnqdfkgsagapsvenvkngirtgfleidehmrvmsekkhg adrsgstavgvlispqhtyfincgdsrgllcrnrkvhfftqdhkpsnplekeriqnaggs vmiqrvngslavsralgdfdykcvhgkgpteqlvspepevhdierseeddqfiilacdgi wdvmgneelcdfvrsrlevtddlekvcnevvdtclykgsrdnmsvilicfpnapkvspea vkkeaeldkylecrveeiikkqgegvpdlvhvmrtlasenipslppggelaskrnvieav ynrlnpy
>4rafA (A:) gafldkpkmekhnaqgqgnglryglssmqgwrvemeaahtaviglpsgleswsffavydg hagsqvakyccehlldhitnnqdfkgsagapsvenvkngirtgfleidehmrvmsekkhg adrsgstavgvlispqhtyfincgdsrgllcrnrkvhfftqdhkpsnplekeriqnaggs vmiqrvngslavsralgdfdykcvhgkgpteqlvspepevhdierseeddqfiilacdgi wdvmgneelcdfvrsrlevtddlekvcnevvdtclykgsrdnmsvilicfpnapkvspea vkkeaeldkylecrveeiikvpdlvhvmrtlasenipslppggelaskrnvieavynrln py