Fig. 16. Schematic representation of a trabecular meshwork cell showing the large number of transporters, channels, and receptors that have been identified in these cells. cAMP, cyclic adenosine monophosphate; cGMP, cyclic guanosine monophosphate; EP2, prostaglandin E2; TP, thromboxane A2. (From Wiederholt M, Stumpff F: The trabecular meshwork and aqueous humor reabsorption. In Civan MM, ed.: Current Topics in Membranes. San Diego: Academic Press, pp.1998:163–202, with permission.)