Chains and heterogens:
PDB Chain Sequences:
>1kn4H (H:) emqlqqsgaellrpgtsvklscktsgyiftsywihwvkqrsgqglewiariypgtgstyy nekfkgkatltadkssstaymqlstlksedsavyfctrwgfipvredyvmdywgqgtlvt vssakttapsvyplapvcgdttgssvtlgclvkgyfpepvtltwnsgslssgvhtfpavl qsdlytlsssvtvtsstwpsqsitcnvahpasstkvdkkiep
>1kn4L (L:) divmtqspltlsvtigqpasisckssqsllysngktylnwllqrpgqspkrlihlvskld sgvpdritgsgsgtdftlkisrveaadlgvyycvqgthfpytfgggtkleilradaaptv sifppsseqltsggasvvcflnnfypkdinvkwkidgserqngvlnswtdqdskdstysm sstltltkdeyerhnsytceathktstspivksfnrnec