PRIMA1 (Proline Rich Membrane Anchor 1): PRIMA1 is a gene that encodes a protein responsible for anchoring acetylcholinesterase to neuronal membranes. This protein plays a crucial role in the breakdown of the neurotransmitter acetylcholine and is essential for regulating cholinergic neurotransmission. It is also significant in research related to neurodegenerative diseases such as Alzheimer's.