Quantitative colorimetric assay. This assay has high sensitivity and excellent specificity for detection of Integrin Alpha 4 (ITGa4). No significant cross-reactivity or interference between Integrin Alpha 4 (ITGa4) and analogues was observed. Sample types: cell lysates, tissue homogenates. Range: 0.156 - 10 ng/ml. Precision: Intra-Assay: CV<10% / Inter-Assay: CV<12%. Time: 3 hours