Fig. 6. CMZ progenitor cells produce a larger number of progenies compared with central progenitor cells. Histograms of the number of progenies derived from single progenitor cells prepared from the central retina (A,C) or the CMZ (B,D) either in the absence (A,B) or presence (C,D) of chicken Wnt2b CM. The number of progenies within a clone was counted and placed into the bins indicated below. Each value represents the number of clones in each bin divided by the total number of clones. Note that the CMZ progenitor clones contained a larger number of progenies compared with the central progenitor cells.