Protein control, containing more than 20 proteins, e.g. Cystatin C, anti-CCP, RF, CRP and ASL/ASO /// Contains more than 95% human serum with no preservatives or stabilizers added /// Protein documentation with assigned values on nephelometric and turbidimetric methods /// Two clinically relevant levels each level available separately /// No need for reconstitution, eliminates potential handling errors and ready to use immediately after thawing /// Please note: Analyte composition and analyte concentration may vary with each LOT or instrument. Refer to the package insert of currently available lots for specific analyte and stability claim