Fig 5. Inhibition of sialidase activity of bacterial α(2,6)-STs by AP.

Sialidase activities of Pd- (A), P224- (B), and P145-STs (C) increased by 1 mM CMP addition were inhibited by supplemental addition of AP in a concentration dependent manner (0.1, 0.4, 1.5, and 5 U/μl). Relative contents (%) of lactose were calculated in the same way as in Fig 4.