>1KL3_1|Chains A, B, C, D|streptavidin|Streptomyces avidinii (1895) MEAGITGTWYNQLGSTFIVTAGADGALTGTYVTARGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAAS >1KL3_2|Chains E, F, G, H|strep-tag II peptide|null NWSHPQFEK