Test Principle The TGF-betayo2 EIA is a solid phase enzyme-linked immunosorbent assay, which is based on the sandwich principle. Samples: Serum and EDTA or sodium citrate plasma. Performance Characteristics: Standard curve: from 1000 to 32.5 pg/ml.Sensitivity:The lowest detectable level of TGF-betayo2 that can be detected is 10 pg/ml.Specificity:No crossreactivity with TGF-betayo1 and TGF-betayo3. Specific for human, rat, bovine and porcine TGF-beta 2.