Chains and heterogens:
PDB Chain Sequences:
>1kxu_ (-) wtfsseeqlarlradanrkfrckavangkvlpndpvflepheemtlckyyekrllefcsv fkpamprsvvgtacmyfkrfylnnsvmeyhpriimltcaflackvdefnvsspqfvgnlr esplgqekaleqileyellliqqlnfhlivhnpyrpfegflidlktrypilenpeilrkt addflnrialtdayllytpsqialtailssasragitmesylseslmlkenrtclsqlld imksmrnlvkkyepprseevavlkqklerchsaela