Calibrator 10 is a lyophilized blend of 10 recombinant human proteins: Eotaxin-2, GRO-α, I-309, M-CSF, MCP-2, MCP-3, MIF, MIP-5, TRAIL, and YKL-40. It is intended for use as an assay calibrator for MSD U-PLEX human and non-human primate 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 10 were expressed in E.coli. Instructions on using Calibrator 10 are provided in U-PLEX Biomarker Group 1 Human Product Inserts and U-PLEX Biomarker Group 1 NHP Product Inserts.