Quantitative colorimetric assay. This kit is for the detection of Heat Shock 70kDa Protein 5 HSPA5 / GRP78 / BiP. No significant cross-reactivity or interference between HSPA5 / GRP78 / BiP and analogs was observed. This claim is limited by existing techniques therefore cross-reactivity may exist with untested analogs. Sample types: plasma, serum. Range: 2.5 - 50 ng/ml. Precision: Intra-Assay: CV%<10% Inter-Assay: CV%<10%. Time: 1.5 hours