Tags: Protein.
Synapsin I is the collective name for Synapsin Ia and Synapsin Ib two nearly identical phosphoproteins that in humans are encoded by the SYN1 gene. In its phosphorylated form Synapsin I may also be referred to as phosphosynaspin I. Synapsin I is the first of the proteins in the synapsin family of phosphoproteins in the synaptic vesicles present in the central and peripheral nervous systems.