Supplier Page from MedChemExpress for 15-Oxospiramilactone
0.25% Trypsin-EDTA (1×), no phenol red from MedChemExpress
Anti-HA Magnetic Agarose Beads from MedChemExpress
Fmoc-Ala-OH-3-13C from MedChemExpress
Protease Inhibitor Cocktail, Bacteria (EDTA-Free, 100× in DMSO) from MedChemExpress