SiR-DNA (also known as SiR-Hoechst) is a live cell nuclear stain based on the DNA minor groove binder bisbenzimide, it allows the labelling of DNA in live cells with high specificity and low background. SiR-DNA is fluorogenic, cell permeable and highly specific for DNA. Sir-DNA stains the nuclei of live cells without the need for genetic manipulation or overexpression. Its emission in the far red minimizes phototoxicity and sample autofluorescence. SiR-DNA is compatible with GFP and/or m-cherry fluorescent proteins. SiR-DNA is a non cytotoxic alternative to DRAQ5. It can be imaged with standard Cy5 filtersets. SiR-DNA can be used for widefield, confocal, SIM or STED imaging in living cells and tissue. Our new product SPY650-DNA is an improved version of SiR-DNA. SPY650-DNA stains cells with brighter signal and with less background while still compatible with superresolution.
