<P> The other, alternatively spliced form expressed primarily in the erythroid tissues, differs at the C - terminus, and contains a cleavable hydrophobic peptide with a PI - anchor site . It associates with membranes through the phosphoinositide (PI) moieties added post-translationally . </P> <P> The third type has, so far, only been found in Torpedo sp. and mice although it is hypothesized in other species . It is thought to be involved in the stress response and, possibly, inflammation . </P> <P> The nomenclatural variations of ACHE and of cholinesterases generally are discussed at Cholinesterase § Types and nomenclature . </P> <P> For acetylcholine esterase (AChE), reversible inhibitors are those that do not irreversibly bond to and decactivate AChE . Drugs that reversibly inhibit acetylcholine esterase are being explored as treatments for Alzheimer's disease and myasthenia gravis, among others . Examples include tacrine and aricept . </P>

An enzyme known as acetylcholinesterase is present in the synaptic cleft what is its role