When PERK is activated (thus becoming phosphorylated PERK, or pPERK), a kinase domain on the cytosolic side of the protein phosphorylates eukaryotic translation initiation factor 2α (eIF2α or peIF2α when phosphorylated).
Based on this low glutamate affinity, it has been proposed that mGlu7 may serve as an "emergency brake", only becoming activated during intense synaptic activity when glutamate levels rise to high micromolar levels.
This is not surprising as cells in the udder are becoming activated in themselves to respond directly to the invading pathogen or signalling to activate and recruit other cells to the site of infection.
This GTPase is likely αβ-tubulin itself; however, which GTPase site (N or E-site) is becoming activated, and which mechanism is behind its activation, both remain to be determined.
C. albicans is able to activate Hsf1 within 1 min of exposure to a heat shock (11), suggesting that the sensor itself may reside in the plasma membrane, becoming activated upon slight changes in membrane fluidity.
A lot more people are becoming activated and are interested in issues like this, because it's becoming increasingly difficult to ignore.
King's team has found a funnel-web spider venom peptide that binds to this channel and stops it from becoming activated during stroke.
Consider first n activated neurons, each becoming quiescent at the rate α.
The kallikrein-kinin cascade, also referred to as the "contact activation pathway" or intrinsic pathway, is initiated when factor XII (Hageman factor) binds to damaged tissue, becoming activated through conversion to factor XIIa. Factor XIIa converts prekallikrein to plasma kallikrein, and these two proteins autoactivate each other through a positive feedback loop.
Squash seeds called protease trypsin inhibitors that impede viruses and cancer causing compounds from becoming activated in the intestinal tract.
