Peroxisome Flashcards
Where are peroxisomes abundant, and what is their crystallized structure?
Peroxisomes are abundant in the liver. They have a crystallized structure of catalase.
What is the significance of plasmalogen, and where is its first reaction catalyzed?
The first reaction of plasmalogen is catalyzed in the peroxisome. It is particularly important for neurons.
Provide the chemical equation involving RH2, O2, R, and H2O2 related to peroxisomes.
“RH2 + O2 → R + H2O2 2H2O ↔ H2 + 2H2O”
Where are glyoxysomes and what is their function?
Glyoxysomes are only found in plants, and they convert fatty acids to glucose.
Describe the peroxisomal targeting sequences (PTS) and their receptors.
80% of C-terminus ones are named PTS1, and PTS1 goes to the Pex5 receptor. Pex5 goes to the Pex14 receptor, then inside, the Pex5 receptor is recycled.
-20% of N-terminus ones are named PTS2, and PTS2 goes to the Pex7 receptor. Pex5 goes to the Pex14 receptor, then inside, the Pex7 receptor is recycled.
What do PTS and Pex stand for?
PTS stands for peroxisomal targeting sequence, and Pex stands for Peroxins.
Is the origin of peroxisomes clear, or is there a debate regarding their formation?
The origin of peroxisomes is debated. It is questioned whether peroxisomes are ER vesicles budded off from the ER due to signaling
