Enhanced transient receptor potential channel-mediated Ca<sup>2+</sup> influx in the cells with phospholipase C-δ1 overexpression: its possible role in coronary artery spasm.
Phospholipase C-δ1 activity is enhanced in patients with coronary artery spasm, and a p122 protein was recently cloned to potentiate phospholipase C-δ1 activity.