IC50 values of each chain-length of poly(P) for rh-TRAP activity.

pNPP (8 mM) were incubated with rh-TRAP in the reaction mixture in the presence or absence of the indicated chain-length of poly(P) (10−8, 10−7, 10−6, 10−5, 10−4, 10−3 or 10−2 M) for 2 h at 37°C. IC50 was average value of three independent experiments and determined by plotting the inhibition rate of phosphatase activity versus the logarithm of poly(P) concentration. SD represents standard deviation.