- Demonstration of functional coupling between gamma -aminobutyric acid (GABA) synthesis and vesicular GABA transport into synaptic vesicles. Jin, H., Wu, H., Osterhaus, G., Wei, J., Davis, K., Sha, D., Floor, E., Hsu, C.C., Kopke, R.D., Wu, J.Y. Proc. Natl. Acad. Sci. U.S.A. (2003)