It is well documented that T cell proliferation and activation is dependent on the purine nucleotide phosphorylase (PNP) enzyme activity.
Donato et al., "Capillary bioreactors based on human purine nucleoside phosphorylase: a new approach for ligands identification and characterization," Journal of Chromatography.
We previously reported that pentacyclic triterpene inhibits glycogen phosphorylase
(GP) and can be used as a new strategy to lower blood glucose  using natural substances with low toxicity [7-11].
The role of blood platelets in nucleoside metabolism: assay, cellular location and significance of thymidine phosphorylase
in human blood [Review].
Intracellular localization of phosphorylases
in spinach and pea leaves.
In muscle cells, for example, an enzyme called phosphorylase
releases stored energy.
One of the most common resistance mechanisms against aminoglycosides is the production of aminoglycoside-modifying enzymes, such as aminoglycoside acetyltransferases, aminoglycoside phosphorylases
, and aminoglycoside adenyltransferases (5), which are mainly mediated by transferable large plasmids.
But it's possible to create new or enhanced functionalities for starch by enzymatically changing its structural properties using glucosyltransferases, such as phosphorylases
and branching enzymes.
Kinetic properties of two starch phosphorylases
from pea seeds.
Fosphenytoin itself has no pharmacological activity but is dephosphorylated in vivo by phosphorylases
to the active drug, phenytoin.
Glycogen synthase and glycogen phosphorylase
are the rate-limiting enzymes in glycogen metabolism.
We describe here the development of the first homogeneous enzyme immunoassay for [T.sub.3], with [T.sub.3] conjugated to glycogen phosphorylase
b (GPb) from rabbit muscle.