| CHK was found to be associated with tyrosine phosphorylated TrkA receptors in PC 12 cells upon stimulation with NGF . 0.83353221^^^ Thus , CHK is a novel signaling molecule that participates in TrkA signaling , associates directly with TrkA receptors upon NGF stimulation , and is involved in neurite outgrowth of PC 12 cells in response to NGF . . 0.58774767^^^ |