SiR-tubulin is based on the microtubule binding drug Docetaxel. SiR-tubulin is fluorogenic, cell permeable and highly specific for microtubules. Sir-tubulin stains endogenous microtubules without the need for genetic manipulation or overexpression. Its emission in the far red minimizes phototoxicity and sample autofluorescence. SiR-tubulin is compatible with GFP and/or m-cherry fluorescent proteins. It can be imaged with standard Cy5 filtersets. SiR-tubulin can be used for widefield, confocal, SIM or STED imaging in living cells and tissue. Probe quantity allows 50 – 200 staining experiments.*
λabs 652 nm
εmax 1.0·105 mol-1·cm-1
λfl 674 nm
Did you know? Our New product SPY650-tubulin is an improved version of SiR-tubulin. SPY650-tubulin stains cells with a brighter signal and with less background than SiR-tubulin while still compatible with superresolution. Learn more about it here: SPY650-tubulin
*Based on the following conditions: 0.5 – 1 ml staining solution / staining experiments with 0.5 – 1 uM probe concentration. The number of staining experiments can be further increased by reducing volume or probe concentration.