TMRE (Tetramethylrhodamine ethyl ester, perchlorate) and TMRM are preferred dyes for quantitative measurements of membrane potentials using the Nernst equation. TMRE has been used to separate viable and non-apoptotic cells from cell sorting samples. TMRE staining is reversible and does not affect cell proliferation and viability. TMRE is also available in solid form.    &lamba;Ex/&lamba;Em (MeOH) = 549/574 nm  Store the solution at 4°C and protect from light  C26H27ClIN2O7  MWt: 515  [115532-52-0]