Calibrator 11 is a lyophilized blend of 3 recombinant human proteins: TGF-β1, TGF-β2, and TGF-β3. It is intended for use as an assay calibrator for MSD U-PLEX assays that measure any of the included proteins. The utility of this product has not been evaluated in other applications. Individual analyte concentrations are provided in the lot-specific certificates of analysis. All analytes in Calibrator 11 were expressed in E.coli. Instructions on using Calibrator 11 are provided in U-PLEX Group 2 Product Inserts.