Human CD19 ELISA Kit is a sandwich ELISA kit for use with Tissue homogenates, cell lysates and other biological fluids. This assay has high sensitivity and excellent specificity for detection of Cluster Of Differentiation 19 (CD19). No significant cross-reactivity or interference between Cluster Of Differentiation 19 (CD19) and analogues was observed. Please note that this kit is also available as a CLIA Kit. Quantitative Colorimetric Sandwich ELISA. Sample Types: tissue homogenates, cell lysates and other biological fluids. Range: 0.312 ng/ml - 20 ng/ml. Sensitivity: < 0.118 ng/ml