>6y3q_A: Streptavidin MASMTGGQQMGRDQAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWK NNYRNAHSATTWSGQYVGGAEARINTQWLLTRGTTEANAWESTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ