4-Aminofluorescein Diacetate DAF-2 DA Negative Control White solid. PROTECT FROM LIGHT. PACKAGED UNDER INERT GAS. A cell-permeable negative control compound for the nitric oxide (NO) fluorescent indicator DAF-2 DA (Cat. No. 251505). Unlike DAF-2 DA, 4-AF DA does not react with NO to form a fluorescent product. Purity: ≥98% by HPLC. Ref.: Kojima, H., et al. 1998. NeuroReport 9, 3345. |