MAP2, or microtubule-associated protein 2, is a member of the microtubule-associated protein family. The exact function is not fully understood, but it is known to play a role in microtubule formation and stabilization, particularly in neuronal development. In humans it is encoded by the gene, MAP2. Other synonyms include MAP2A, MAP2B, and MAP2C. The canonical human protein has a length of 1,827 aa and a size of 199.5 kDa. There are three other isoforms by alternative splicing.