Colorimetric detection of 8-hydroxy-2-deoxy Guanosine. Competitive ELISA (Enzyme-linked Immunosorbent Assay). Sample Types: urine, cell lysates, plasma, sample matrices. Intra-Assay Precision: Three samples of known concentration were assayed thirty times on one plate; the intra-assay coefficient of variation of the DNA Damage ELISA has been determined to be <5%. Inter-Assay Precision: Three samples of known concentration were assayed thirty times in three individual assays; the inter-assay coefficient of variation of the DNA Damage ELISA has been determined to be <5%. Range: 0.94 - 60 ng/mL. Sensitivity: 0.59 ng/mL. Time: 1 hour. Cross-reactivity: 8-Hydroxy-2-deoxy Guanosine (8-OHdG): 100%. 8-Hydroxy Guanosine (8-OHG): 23%. 8-Hydroxy Guanine (8-oxoG): 23%. Guanosine: <0.01%.