The synapsin I protein is a member of the synapsin family that are neuronal phosphoproteins which associate with the cytoplasmic surface of synaptic vesicles. Pathways leading to the induction of human eS6 phosphorylation have been found to enhance IL-8 protein synthesis. This mechanism is dependent on A/U-rich proximal sequences (APS) found in the 3'UTR of IL-8 immediately after the stop codon. Synapsin I plays important roles in synapse formation where they specifically minimize depletion of the neurotransmitter at the inhibitory synapses by contributing to the anchoring of synaptic vesicles.