500
These are 3 of the 4 pathways that occur because of the effect of ROS on GAPDH (Glyceraldehyde-3-Phosphate Dehydrogenase)
What is Polyol pathway (Glucose-> Fructose via Sorbitol), Hexosamine pathway (Fructose-6-P-> Glucosamine-6-P->UDPGlcNAc), Protein Kinase C pathway (Glyceraldehyde-3-Phosphate->DAG->Protein Kinase C), AGE pathway (Glyceraldehyde-3-Phosphate->methylglyoxal->AGE)