Action Potential-Dependent Regulation of Gene Expression: Temporal Specificity in Ca²⁺, cAMP-Responsive Element Binding Proteins, and Mitogen-Activated Protein Kinase Signaling

We thank J. Morgan, T. Curran, and L. Robertson for generously providing the fos/LacZ transgenic mouse strain and D. Abebe for establishing and maintaining the colony of transgenic mice.

Correspondence should be addressed to Dr. R. Douglas Fields, Head, Neurocytology and Physiology Unit, National Institutes of Health, National Institute of Child Health and Human Development, Laboratory of Developmental Neurobiology, Building 49, Room 5A38, Bethesda, MD 20892.

Dr. Itoh’s present address: Tokyo Metropolitan Institute of Medical Science, Tokyo 113, Japan.