These experiments were performed using the transgenic line Tg[gfap:EGFP]mi2002, in which eGFP is expressed in Müller glia. (A) Triple labeling using in situ hybridization for mmp-9 (red) and immunostaining for BrdU for dividing cells (white), combined with GFP immunostaining (green). (B) Number of BrdU+ cells that express mmp-9 in unlesioned animals and lesioned animals at 24, 48, and 72 hpl. (C) Number of GFP+ Müller glia that also express mmp-9 expression at 24, 48, and 72 hpl. ONL- outer nuclear layer; INL- inner nuclear layer; GCL- ganglion cell layer. Scale bar equals 25μm.