MQAE is a novel chloride ion fluorescence probe excited by ultraviolet light. MQAE, binding bromine ion as ligand, can be used to detect the activity of chloride. MQAE exhibits a reduction of fluorescence intensity with the increase of intracellular Cl- concentration. MQAE has a pH-independent fluorescence intensity basically at a Cl- concentration <50 nM. MQAE has high water solubility and cell permeability, MQAE has been used for fluorescence detection such as confocal microscopy and flow cytometry. MQAE is a fluorescent indicator that is quenched via collision with chloride, and is more sensitive and selective than 36Cl and microelectrode-based methods for chloride measurement in cells. Ex/Em=350/460 nm
| Molecular Weight | 326.19 |
| Formula | C14H16BrNO3 |
| CAS Number | 162558-52-3 |
| Solubility (25°C) | Water 90 mg/mL DMSO ≥ 35 mg/mL |
| Storage | 2-8°C, protect from light, dry, sealed |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
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