Chains and heterogens:
PDB Chain Sequences:
>1k2xA (A:) gkaviaihggagaisraqmslqqelryiealsaivetgqkmleagesaldvvteavrlle ecplfnagigavftrdetheldacvmdgntlkagavagvshlrnpvlaarlvmeqsphvm migegaenfafargmervspeifstslryeqllaarkegatvldhsgapldekqkmg
>1k2xA (A:) gkaviaihggagaisraqmslqqelryiealsaivetgqkmleagesaldvvteavrlle ecplfnagigavftrdetheldacvmdgntlkagavagvshlrnpvlaarlvmeqsphvm migegaenfafargmervspeifstslryeqllaar
>1k2xB (B:) tvgavaldldgnlaaatstggmtnklpgrvgdsplvgagcyannasvavsctgtgevfir alaaydiaalmdygglslaeacervvmeklpalggsggliaidhegnvalpfntegmyra wgyagdtpttgiyrekgdtvatq
>1k2xB (B:) tvgavaldldgnlaaatstggmtnklpgrvgdsplvgagcyannasvavsctgtgevfir alaaydiaalmdygglslaeacervvmeklpalggsggliaidhegnvalpfntegmyra wgyagdtpttgiyre
>1k2xC (C:) gkaviaihggagaisraqmslqqelryiealsaivetgqkmleagesaldvvteavrlle ecplfnagigavftrdetheldacvmdgntlkagavagvshlrnpvlaarlvmeqsphvm migegaenfafargmervspeifstslryeqllaarkegatvldhsgapldekqkmg
>1k2xC (C:) gkaviaihggagaisraqmslqqelryiealsaivetgqkmleagesaldvvteavrlle ecplfnagigavftrdetheldacvmdgntlkagavagvshlrnpvlaarlvmeqsphvm migegaenfafargmervspeifstslryeqllaar
>1k2xD (D:) tvgavaldldgnlaaatstggmtnklpgrvgdsplvgagcyannasvavsctgtgevfir alaaydiaalmdygglslaeacervvmeklpalggsggliaidhegnvalpfntegmyra wgyagdtpttgiyrekgdtvatq
>1k2xD (D:) tvgavaldldgnlaaatstggmtnklpgrvgdsplvgagcyannasvavsctgtgevfir alaaydiaalmdygglslaeacervvmeklpalggsggliaidhegnvalpfntegmyra wgyagdtpttgiyre