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