Also available in 5 mg, 10 mg, 25 mg, 50 mg, 100 mg and bulk. Please contact Fisher for quotes. gamma-Secretase modulator 13 is a gamma-secretase modulator (GSMs) that inhibits the production of amyloid beta-peptide Abeta42 and can be used to study Alzheimer's disease and tumors. Purity 99.68%