A. Representative images of expression of NLmiRs and NLGN4X, NLGN4Y (WT, S93P) in rat hippocampal neurons at DIV 13. Surface and intracellular NLGNs were labeled with anti-HA. B. Surface intensity level (means ± S.E.M.) normalized to NLGN4X. P values were calculated by one-way ANOVA Bonferroni’s multiple comparison test. (n=3). C. Experimental design for recording, and representative mEPSC traces recorded in cultured hippocampal neurons expressing NLmiRs or NLmiRs with NLGN4X, NLGN4Y (WT, S93P). D and E. mEPSC frequency cumulative probability and mean. P values were calculated by one-way ANOVA Bonferroni’s multiple comparison test. (n=3). F and G. mEPSC amplitude cumulative probability and mean. P values were calculated by one-way ANOVA with Bonferroni’s multiple comparison test. (n=3).