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  6. PMA, 20mM in H2O - BIT40019

PMA, 20mM in H2O - BIT40019

BIT40019

PMA (propidium monoazide) dye is a DNA modifier invented by scientists at Biotium. It is a photo-reactive DNA-binding dye that is useful for determination of microbial viability by qPCR. Size: 100 uL

Brand: Biotium

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PMA (propidium monoazide) dye is a DNA modifier invented by scientists at Biotium. It is a photo-reactive dye that binds to dsDNA with high affinity. Upon photolysis with visible light, PMA dye covalently attaches itself to dsDNA. The PMA-modified dsDNA cannot be amplified by PCR. The dye is designed to be cell membrane-impermeable. Thus, in a population of live and dead cells, only dead cells are susceptible to DNA modification due to compromised cell membranes. This unique feature of PMA dye makes it highly useful in selective detection of live bacteria by qPCR. A bacterial sample can be first pre-treated with PMA under light to inactivate dsDNA from dead cells. DNA is then extracted and analyzed by PCR.

FEATURES

  • Molecular weight: 511
  • Abs = 464 nm (before photolysis)
  • Abs/Em = 510/610 nm (following photolysis and covalent attachment to DNA/RNA)
  • Dark red liquid
  • Store at -20°C and protect from light at all times