Final answer:
Kinesin is the molecular motor protein used for anterograde axonal transport, moving neurotransmitter vesicles along microtubules within neurons.
Step-by-step explanation:
The molecular motor protein used for anterograde axonal transport is kinesin. Anterograde axonal transport is the process by which neurotransmitters, encased within vesicles, are transported from a neuron's cell body down the axon to the synapse. Kinesin, powered by ATP, moves these vesicles along microtubule tracks within the neuron. Conversely, dynein is responsible for the retrograde transport, moving empty vesicles back towards the cell body after the neurotransmitters have been released. Myosin participates in movement along microfilaments, while actin provides the track for such movement but is not a motor protein itself.