What is PicoGreen DNA assay?
By Penelope Carter
What is PicoGreen DNA assay?
PicoGreen dsDNA Quantitation Reagent is an. ultra-sensitive fluorescent nucleic acid stain for. quantitating double-stranded DNA (dsDNA) in. molecular biological procedures such as cDNA. synthesis for library production and DNA.
How does PicoGreen assay work?
PicoGreen is a fluorescent probe that binds dsDNA and forms a highly luminescent complex when compared to the free dye in solution. On binding to DNA, intercalation and electrostatic interactions immobilize the dye molecule, resulting in a >1000-fold enhancement in its fluorescence.
What does PicoGreen stain?
The PicoGreen® dye is a fluorescent nucleic acid stain for quantitating double-stranded DNA (dsDNA). The main disadvantage of general UV spectroscopy for dsDNA quantitation is the contribution of signal from single- stranded DNA (ssDNA) and other contaminants, such as protein and extraction buffers.
Is PicoGreen cell permeable?
SYBR Green is a cell permeable DNA stain, while PicoGreen cannot penetrate the cell membrane and needs cell permeation treatment prior to staining to increase DNA binding efficiency and thereby improve the bacterial detection limit [11] .
Which reagent is used for quantifying DNA?
Fluorescence detection with Hoechst 33258 reagent is a sensitive and precise method for DNA quantification if the G+C content is less than 50%. In addition, this method allows quantification of very low levels of DNA (nanogram scale).
What does CyQUANT measure?
The CyQUANT® Cell Proliferation Assay is a highly sensitive fluorescence-based method for quantifying cells and assessing cell proliferation and cytotoxicity.
Why is 260 nm used to estimate DNA concentration?
Nucleic acids strongly absorb UV light with wavelengths of 260 nm due to the resonance structure of the purine and pyrimidine bases [7]. The absorbance is converted into ng/μL of double stranded DNA (dsDNA) using the established conversion factor of 50 ng/μL for 1 optical density unit at 260 nm [9].
