- A positron-emitter labeled glycine(B) site antagonist, [(11)C]L-703,717, preferentially binds to a cerebellar NMDA receptor subtype consisting of GluR epsilon3 subunit in vivo, but not in vitro. Haradahira, T., Okauchi, T., Maeda, J., Zhang, M.R., Kida, T., Kawabe, K., Mishina, M., Watanabe, Y., Suzuki, K., Suhara, T. Synapse (2002)