... of the res-idues involved in phosphate and calcium binding areconserved in the PhyH-DII sequence, whereas onlyone phosphate-binding residue is conserved in the PhyH-DI sequence (Fig. S1). There ... (Fig. 3A,B). The presence of Ca2+increased the thermal stability of PhyH and PhyH-DII.After incubation at 60 °C for 30 min, both enzymesretained > 70% of their initial activity in the presenceof ... of the enzyme [12,13]. BPP prefers the hydrolysis of every second phosphate over adjacentones, and degrades InsP6gradually into InsP5, InsP4, and the final product – Ins(2,4,6)P3 and Ins(1,3,5)P3–via...