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