Figure 4.

The inhibition of the α-galactosidases by either raffinose or stachyose. For the assay of inhibition of the acid form and alkaline form I, the assay medium contained 10 mm raffinose and increasing amounts of stachyose were added. For alkaline form II, the assay medium contained 10 mm stachyose and increasing amounts of raffinose were added. The activity was measured by the production of free Gal.