NEUROSCIENCE. For the article “Sex and estrogenic effects on coexpression of mRNAs in single ventromedial hypothalamic neurons,” by N. Devidze, J. A. Mong, A. M. Jasnow, L.-M. Kow, and D. W. Pfaff, which appeared in issue 40, October 4, 2005, of Proc. Natl. Acad. Sci. USA (102, 14446–14451; first published September 26, 2005; 10.1073/pnas.0507144102), the authors note that “%” was added after several numbers, due to a printer's error. On page 14449, right column, the second sentence under Estrogen Treatment Increases Number of ERα, ERβ, OTR, and PKCs in Female Rats, “In estrogen-treated animals, these numbers were higher than in the oil group, ERα (66% vs. 20%), ERβ (39% vs. 14%), OTR (56% vs. 15%), PKCδ (28% vs. 8%), PKCε (30% vs. 8%), and PKCη (44% vs. 12%) (P < 0.05 in all cases) (Tables 3 and 4),” should read: “In estrogen-treated animals, these numbers were higher than in the oil group, ERα (66 vs. 20), ERβ (39 vs. 14), OTR (56 vs. 15), PKCδ (28 vs. 8), PKCε (30 vs. 8), and PKCη (44 vs. 12) (P < 0.05 in all cases) (Tables 3 and 4).” This error does not change the conclusions of the article.