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Rhodamine 123 is a membrane-permeable cationic dye that is readily accumulated within living cells. It is a substrate for the efflux pump P-glycoprotein (P-gp; also known as multidrug resistance protein 1 and ABCB1) and is rapidly exported from cells with functional P-gp. As P-gp is expressed on a population of stem cells known as the side population, rhodamine 123 is used to detect this group of stem cells. Rhodamine 123 also accumulates within mitochondria due to its positive charge and can inhibit oxidative phosphorylation. Rhodamine 123 has excitation/emission maxima of 507/529 nm.

red-brown to brown or dark green powder

Fluorescent dye most commonly used as functional reporter in flow cytometry.

Rhodamine derivative, a fluoresent dye-labeled compound.

Rhodamine-123 lycoprotein (P-gp) functional efflux activity in vivo. Rhodamine-123 PE-Cy5 and AMCA (7-amino-4-methylcoumarin-3-acetic acid).

Useful as a laser dye and to have selective cell growth effects. Mitochondrial specific fluorescent dye and substrate for P-glycoprotein.

rhodamine 123, which was identified as a member of the rhodamine family of flurone dyes, was used to examine membrane transport by the abcb1 gene product, mdr1. previous study determined the λmax for excitation and emission for rhodamine 123 in commonly used solvents and extraction buffers, indicating that the fluorescence of rhodamine 123 was highly dependent on the chemical environment. the optimal parameters are 1% methanol in hbss. in addition, the uptake of rhodamine 123 into cells was via both passive and active processes, and this occurred mainly by oatp1a2-mediated transport. furthermore, this previous study quantified the intracellular sequestration and metabolism of rhodamine 123, showing that these were both cell line-dependent factors that might influence the interpretation of transport assays [1].

4°C, protect from light

[1] samantha forster et al. characterization of rhodamine-123 as a tracer dye for use in in vitro drug transport assays. plos one. 2012; 7(3): e33253.