Claim: RHEB (also known as Ras homolog enriched in brain) is a GTP-binding protein (a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior) that is ubiquitously expressed in humans and other mammals that may be used for neural plasticity, albeit a novel functionality at the moment and is not typically associated with the Ras proteins.
Evidence: RHEB also known as Ras homolog enriched in brain (RHEB) is a GTP-binding protein that is ubiquitously expressed in humans and other mammals. RHEB may be involved in neural plasticity. This function is novel and not typically associated with the Ras proteins. G proteins, also known as guanine nucleotide-binding proteins, are a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior.