4',6'-Diamidino-2-phenylindole dihydrochloride (DAPI dihydrochloride) fluorescent labeling reagent

Supplier: STEMCELL Technologies

STMC75004EA 240 EUR
STMC75004
4',6'-Diamidino-2-phenylindole dihydrochloride (DAPI dihydrochloride) fluorescent labeling reagent
4',6'-Diamidino-2-phenylindole dihydrochloride (DAPI dihydrochloride)

DAPI (4',6-diamidino-2-phenylindole dihydrochloride) is a blue-fluorescent dye that binds to AT-rich regions of double-stranded DNA.


  • DNA-labeling dye


Binding is accompanied by an ~20-fold enhancement in fluorescence, which is directly proportional to the amount of DNA present and has an emission maximum at ~454 nm. The complex is stable for several hours at room temperature and over the pH range 4 - 11. DAPI can also bind to RNA, evidently through AU-selective intercalation, though the DAPI/RNA complex emits at a longer wavelength (500 nm) and with only an ~20% increase in quantum yield. DAPI has been widely used as a counterstain to detect nuclei in multicolor fluorescence applications, where its blue fluorescence vividly contrasts with red, yellow, or green fluorescent dyes used to stain other structures. It has also been used for studying apoptosis (at low concentrations the dye is excluded from live cells but penetrates dead or damaged cells), and in quantitative DNA assays, in situ hybridization, chromosome sorting and mycoplasma detection assays.


Upozornení: Product restrictions: (i) Customer shall not make products or any portion of them in any way, shape or form, including as a component of another product available for the purpose of further resale or alter or remove the Product label and the Supplier’s mark of origin without express written permission of Supplier and (ii) Customer is familiar with Supplier’s restrictions on the use of the products and shall use the products in compliance with such restrictions and the applicable Supplier Product Information sheet (collectively, the 'Product Restrictions').

Formula: C₁₆H₁₅N₅·2HCl
MW: 350,25 g/mol
MDL Number: MFCD00012681
CAS Number: 28718-90-3

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