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DAPI
DAPI is a fluorescent stain that binds strongly to DNA. It is used extensively in fluorescence microscopy. Since DAPI passes through an intact cell membrane, it can be used to stain live cells besides fixed cells. For fluorescence microscopy, DAPI is excited with ultraviolet light. When bound to double-stranded DNA its absorption maximum is at 358 nm and its emission maximum is at 461 nm. One drawback of DAPI is that its emission is fairly broad. DAPI also binds to RNA although it is not as strongly fluorescent as it binds to DNA. Its emission shifts to around 500 nm when bound to RNA. DAPI's blue emission is convenient for multiplexing assays since there is very little fluorescence overlap between DAPI and green-fluorescent molecules like fluorescein and green fluorescent protein (GFP), or red-fluorescent stains like Texas Red. Besides labeling cell nuclei, DAPI is also used for the detection of mycoplasma or virus DNA in cell cultures. DAPI dilactate has improved water solubility compared to DAPI HCl salt.
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References
View all 48 references: Citation Explorer
Differential pulse voltammetric studies of ethidium bromide binding to DNA
Authors: Minasyan SH, Tavadyan LA, Antonyan AP, Davtyan HG, Parsadanyan MA, Vardevanyan PO.
Journal: Bioelectrochemistry (2006): 48
Authors: Minasyan SH, Tavadyan LA, Antonyan AP, Davtyan HG, Parsadanyan MA, Vardevanyan PO.
Journal: Bioelectrochemistry (2006): 48
Possible errors in the interpretation of ethidium bromide and PicoGreen DNA staining results from ethidium monoazide-treated DNA
Authors: Hein I, Flekna G, Wagner M, Nocker A, Camper AK.
Journal: Appl Environ Microbiol (2006): 6860
Authors: Hein I, Flekna G, Wagner M, Nocker A, Camper AK.
Journal: Appl Environ Microbiol (2006): 6860
Ethidium bromide inhibits rat brain acetylcholinesterase activity in vitro
Authors: Mazzanti CM, Spanevello RM, Obregon A, Pereira LB, Streher CA, Ahmed M, Mazzanti A, Graca DL, Morsch VM, Schetinger MR.
Journal: Chem Biol Interact (2006): 121
Authors: Mazzanti CM, Spanevello RM, Obregon A, Pereira LB, Streher CA, Ahmed M, Mazzanti A, Graca DL, Morsch VM, Schetinger MR.
Journal: Chem Biol Interact (2006): 121
Delayed Schwann cell and oligodendrocyte remyelination after ethidium bromide injection in the brainstem of Wistar rats submitted to streptozotocin diabetogenic treatment
Authors: Bondan EF, Lallo MA, Trigueiro AH, Ribeiro CP, Sinhorini IL, Graca DL.
Journal: Braz J Med Biol Res (2006): 637
Authors: Bondan EF, Lallo MA, Trigueiro AH, Ribeiro CP, Sinhorini IL, Graca DL.
Journal: Braz J Med Biol Res (2006): 637
A low dose of ethidium bromide leads to an increase of total mitochondrial DNA while higher concentrations induce the mtDNA 4997 deletion in a human neuronal cell line
Authors: von Wurmb-Schwark N, Cavelier L, Cortopassi GA.
Journal: Mutat Res (2006): 57
Authors: von Wurmb-Schwark N, Cavelier L, Cortopassi GA.
Journal: Mutat Res (2006): 57
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