 TP is classified as a contractile type of prostenoid receptor based on its ability to contract diverse types of smooth muscle-containing tissues such as those of the lung, intestines, and uterus.TP contracts smooth muscle and stimulates various response in a wide range of other cell tytes by coupling with and mobilizing one or more families of the G protein class of receptor-regulated cell signaling molecules.When bound to TXA2, PGH2, or other of its agonists, TP mobilizes members of the