pH and Phytase

The graphed curves in this section show different ways of expressing phytase activity under varying pH conditions. Phytase O, Phytase R and Phytase N are three different phytases. In chart 1, which expresses % relative activity at different pH levels, it appears that Phytase O is most active at the lower pH levels. In chart 2, we look at the same three phytases, but this time measure the µmol of phosphorus liberated/minute. Now Phytase R and N show increased P release. Finally, in chart 3, where activity is measured based on the µmol of phosphorus liberated/minute/gram of phytase, Phytase R shows a clear advantage. The fourth tab in this section shows how each of the phytases perform in segments of the actual GI tract, considering varying pHs and times. This is the most accurate way to measure the impact of pH on each of the products, again measured as a function of total phosphorus liberated.