SV2A and schizophrenia: To address this, we investigated whole brain grey matter synaptic vesicle glycoprotein 2A (SV2A) levels and examined their relationship with intellectual functioning and age, in forty-three patients with schizophrenia (SCZ) and 26 healthy volunteers (HV), using [<sup>11</sup>C]UCB-J positron emission tomography (PET).