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Immunohistochemistry was performed to identify Tbr2+ intermediate progenitor cells (a, b) and Tbr1+ newborn postmitotic cells (c, d) within the presumptive prefrontal cortex of E15 Tor1A+/+ and Tor1A−/− mice. Numerical density of Tbr2+ (e) and Tbr1+ (f) cells was compared between Tor1A+/+ and Tor1A−/− embryos. Error bars indicate SEM.
