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