What is GRIN2B? GRIN2B is not the name of a disease or disorder, but is the name of a gene located on the 12th chromosome. Its function is to encode a protein that forms a receptor responsible for sending chemical messages to the brain. A variation on the GRIN2B gene means that some portion of this specific genetic code either got deleted, duplicated or rearranged. As of 2018, changes to the GRIN2B gene are now being referred to as GRIN2B-Related Neurodevelopmental Disorder.
