“In addition PIP2 decreases K0.5 of Ca2+ more than 3-fold, that of DOG almost 5-fold and that of POPS by a half.”
“The K0.5 values of PIP2 amounted to only 0.11 µM in the presence of DOG and 0.39 in its absence, which is within the expected physiological range for the inner monolayer of a mammalian plasma membrane.”