aid in the reuptake of neurotransmitters in the post synpatic cell

hold vesicles in place close to the active zone in close proximity of voltage gated Na+ channels

hold vesicles in place close to the active zone in close proximity of transmitter gated Ca++ channels

hold vesicles in place close to the active zone in close proximity of voltage gated Ca++ channels

transport vesicles from the active zone back to the cell body for packing of neurotransmitters