General Description
3-2
PyroMark Q24 MDx User Manual 01/2016
5.
ATP sulfurylase quantitatively converts PPi to ATP in the
presence of adenosine 5' phosphosulfate.
6.
This drives the conversion of luciferin to oxyluciferin by
luciferase, generating visible light in amounts
proportional to the amount of ATP. Light is detected
using charged coupled devices (CCDs) and seen as a
peak in the Pyrogram
®
. Each light signal is proportional
to the number of nucleotides incorporated.
7.
Apyrase, a nucleotide-degrading enzyme, continuously
degrades unincorporated nucleotides and ATP. When
degradation is complete, another nucleotide is added.
8.
Nucleotides are added one at a time.
Note
: Deoxyadenosine alfa-thio triphosphate (dATP
α
S)
is used instead of natural deoxyadenosine triphosphate
(dATP) since it is used efficiently by the DNA polymerase,
but not recognized by the luciferase.
9.
As the process continues, the complementary sequence is
built up and the nucleotide sequence is determined from
the peak in the Pyrogram.
Summary of Contents for PyroMark Q24 MDx
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