Quantitative colorimetric assay. The Human ICAM-1 ELISA is capable of recognizing both recombinant and naturally produced Human ICAM-1 proteins. The antigens listed below were tested at 50 ng/ml and did not exhibit significant cross reactivity or interference. ? Human: IFN-gamma, IL-1beta, PECAM-1, TNF-alpha, VCAM-1. Sample types: cell lysates, plasma, serum. Range: 23 - 3000 pg/ml.