in striatal aggregates cultured over a 3-week period , the relative levels of arpp-16 , arpp-21 , and synapsin i/protein iiia ( synaptic vesicle-associated phosphoproteins closely related to each other and treated as a single entity in the present study ) increased with time , whereas the level of arpp-19 decreased .
C0033684
protein
C0031689
phosphoproteins