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Fig. 3. Colony-forming progenitors exist in the Sall1-GFPhigh
subpopulation of the metanephros. (A,B) Cryosections of metanephros
of Sall1-GFP knock-in mouse (A: E11.5; B: E17.5). Blue: DAPI.
(C) Metanephros contains three subpopulations
(Sall1-GFPhigh, Sall1-GFPlow and
Sall1-GFPnegative). The percentages of the subpopulations at each
fetal stage are shown. Figures are the average of five independent
experiments. (D) RT-PCR analysis of three subpopulations included in
E11.5 mesenchyme. (E) Numbers of colonies in each subpopulation derived
from E11.5 mesenchyme, E14.5 and E17.5 metanephros. The numbers of colony were
counted after 20-day culture. The graph shows the average of five independent
experiments. ub, ureteric bud; mes, mesenchyme; c, C-shaped body; rt, renal
tubule. Scale bars: 50 µm.