Phox-I2 is a selective inhibitor of p67phox-Rac1 interaction, binds to p67phox with high affinity with a Kd of ~150 nM. Phox-I2 is a NADPH oxidase 2 (NOX2) inhibitor and inhibits reactive oxygen species (ROS) production.
Phox-I2 is effective in inhibiting NOX2-mediated superoxide production dose-dependently in dHL-60 cells and primary human neutrophils without detectable toxicity[1].
References:
[1]. Emily E Bosco, et al. Rational design of small molecule inhibitors targeting the Rac GTPase-p67(phox) signaling axis in inflammation. Chem Biol. 2012 Feb 24;19(2):228-42.