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