In the article “Activity-Induced Cortical Glutamatergic Neuron Nascent Proteins,” by Lucio M. Schiapparelli, Yi Xie, Pranav Sharma, Daniel B. McClatchy, Yuanhui Ma, John R. Yates 3rd, Anton Maximov, and Hollis T. Cline, which appeared on pages 7900–7920 of the October 19, 2022 issue, the units of PTZ treatments were incorrectly stated throughout to be μg/kg. The correct unit is mg/kg. This error does not affect the conclusions of the article. The online version has been updated.