Currently, I am measuring gamma-secretase activity by lysing mouse brain, obtaining extract, and processing substrate that reacts with gamma-secretase in mouse brain.
The measurement is based on the principle that when gamma-secretase reacts with the substrate, the substrate is split and fluorescence increases.
The positive thing is that activity was confirmed to increase as the protein concentration in the extract increased, but no decrease in activity was seen despite treatment with LY411575 or DAPT, inhibitors of gamma-secretase.
If anyone is conducting a similar experiment, please give me some advice.
thank you!