A, EdU-incorporation assay of OPCs from P0 FB, and P0 and E14 SC. Cells were plated at x1 density. **
indicates p<0.01 (n≥9 wells/group, two-tailed ANOVA followed by Student-Newman-Keuls post hoc
test). B-F, OPC proliferation in FB-SC OPC co-cultures. B, Cells were mixed at 1:1 ratio and plated at
x1 density. A representative phase contrast image of the co-culture of FB and SC OPCs. The green fluorescent overlay shows EGFP+
FB OPCs isolated from EGFP-transgenic rats. C-E, Representative histograms showing the gating strategy used for the
quantification of EdU+ cells in EGFP− and EGFP+ cells in co-cultures. First, EGFP− and EGFP+ cells were gated by the
gate R2 and R3, respectively (C). Then, number of EdU+ cells was counted by the gate R4 in the R2 (EGFP−)
population (D) and by the gate R5 in the R3 (EGFP+) population (E). F, The percentage of
EdU+ cells in EGFP− and EGFP+ cells in co-cultures of all four possible combinations. EGFP− and EGFP+ cells were
indicated in black and green letters, respectively. ** indicates p<0.01 (n=12 wells/group, two-tailed ANOVA followed by
Student-Newman-Keuls post hoc test).