PKmito RED (also known as PKMR) is a bright, photostable, non-phototoxic mitochondrial probe based on the PKmito™ dyes developed in the lab of Zhixing Chen at Peking University1). PKmito RED labels mitochondria in live cells with very high specificity. The unique and unmatched feature of PKmito RED is its extremely low phototoxicity, due to the presence of the intramolecular triplet quencher cyclooctatetraene (COT) group. It allows to perform long term imaging of mitochondria without damaging them. PKmito RED accumulates in the mitochondrial inner membrane (IM). It allows imaging mitochonridal cristae structure and dynamics by STED superresolution microscopy using a 660 nm depletion line. PKmito RED does not require any genetic manipulation, transfection or overexpression of fluorescent proteins. PKmito RED enables multicolor imaging with SPY505, SPY620, SPY650, SPY700, SiR or GFP. It can be used for widefield, confocal, SIM or STED imaging in living cells and tissue. Contains 1 vial of PKmito RED (lyophilized).
|Absorbance maximum λabs||549 nm|
|Fluorescence maximum λfl||569 nm|
|Works on fixed cells?||No|
|Probe quantity||100 stainings*|
|Fluorescence lifetime||0.8 ns|
|STED depletion wavelength||660 nm|
*Based on the following conditions: 0.5 ml staining solution / staining experiment with 1x probe concentration. The number of staining experiments can be further increased by reducing the staining solution volume or the probe concentration.
1. Yang, Zhongtian, et al. “Cyclooctatetraene-conjugated cyanine mitochondrial probes minimize phototoxicity in fluorescence and nanoscopic imaging.” Chemical science 11.32 (2020): 8506-8516.