Secondary Streptavidin-HRPSecondary Streptavidin-HRP Conjugate (ready-to-use reagent). For Wes, Sally Sue, and Peggy Sue (2 x 1 mL). Use with a biotinylated antibody. For total protein assay use 042-976 and to detect biotinylated molecular weight ladders use 042-414. Ships with ice pack. Upon receipt, store at 2-8°C.