MQAE (N-(Ethoxycarbonylmethyl)-6-methoxyquinolinium bromide) is an improved chloride indicator that has greater sensitivity to chloride (Ksv= 200M-1) than SPQ (Ksv=118 M-1) and higher fluorescence quantum yield. The ester group of MQAE may slowly hydrolyze inside cells, resulting in a change in its fluorescence response.
- White solid soluble in water and DMSO
- Store at 4°C and protect from light, especially in solution
- λEx/λ Em= 350/460nm
- λµ (344 nm, H2O) = 2,800
- MW: 326.19
1. Am J Physiol 259, C375 (1990).
2. Anal Biochem 178, 355 (1989).
3. Anal Biochem 241, 51 (1996).
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