Vitamin D Binding Protein ELISA is an enzyme immunoassay intended for the quantitative determination of free and not actin complex bound vitamin D binding protein in human serum, plasma and urine. Includes standards and controls Short incubation time of 2 hours and 20 minutes Colorimetric Detection For research use only. Not for use in Diagnostic Procedures. Sample types: Human Plasma, Serum, Urine. Range: 2.2 - 60 ng/mL, Sensitivity: 1.23 ng/mL