Colocalization of candidate Inhibin A receptors to OPCs or OLs. a, OPC reporter mouse (NG2-CreERT2/R26 YFP) (Sozmen et al., 2016) and activin receptor IIa immunostaining. b, Colocalization of the mature OL protein CC1 and Ig superfamily member 1 (IGSF1)/inhibin binding protein/p120. All photomicrographs taken at 7 d after stroke. Scale bar, 100 μm. c, d, Quantification of percent immunopositive staining for ActRIIa and IGSF-1 in Olig2+ cells in control and after stroke. There is no statistically significant difference across conditions.