Chains and heterogens:
PDB Chain Sequences:
>1kn2H (H:) emqlqqsgaellrpgtsvklscktsgyiftsywihwvkqrsgqglewiariypgtgstyy nekfkgkatltadkssstaymqlstlksedsavyfctrwgfipvredyvmdywgqgtlvt vssakttapsvyplapvcgdttgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavl qsdlytlsssvtvtsstwpsqsitcnvahpasstkvdkkiep
>1kn2L (L:) divmtqspltlsvtigqpasisckssqsllysngktylnwllqrpgqspkrlihlvskld sgvpdritgsgsgtdftlkisrveaadlgvyycvqgthfpytfgggtkleilradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysm sstltltkdeyerhnsytceathktstspivksfnrnec