Absence of Long-Term Depression in the Visual Cortex of Glutamic Acid Decarboxylase-65 Knock-Out Mice

↵* S.-Y.C. and B.M. contributed equally to this work.

This study was supported by National Institutes of Health Grants R01-EY12124-03 and P50-MH58880-01. We thank Dr. Mark Bear for valuable comments on this manuscript and Dr. Jokubas Zirbukus for technical help.

Correspondence should be addressed to Alfredo Kirkwood, Mind Brain Institute, Johns Hopkins University, 338 Krieger Hall, 3400 North Charles Street, Baltimore, MD 21218. E-mail: kirkwood{at}jhu.edu.