Lysophosphatidic acid
A lysophosphatidic acid (LPA) is a phospholipid derivative that can act as a signaling molecule. == Function == LPA acts as a potent mitogen due to its activation of three high-affinity G-protein-coupled receptors called LPAR1, LPAR2, and LPAR3 (also known as EDG2, EDG4, and EDG7).