highly significantP = 6 × 10 −23
7C ), of which 558, or 90.6%, a highly significant proportion ( P = 6 × 10 −23 , hypergeometric test), were associated with OLIG2 binding sites within one or more of the CREs defined in this study, suggesting that OLIG2 acts as a transcriptional activator for some of its functions in NS cells.