a. Consecutive optical sections through a zigzag hair follicle. DP cells are green, nuclei are red. b,c. Magnified image from a with (b) and without (c) the green channel to count nuclei in the DP (dotted line, c). d. DP number per zigzag follicle shown for four control mice (Control, Blue) and four mice with β-catenin activated in the DP (CatnEx3, red). Averages ± s.d. are shown. d. Frequency of each hair type in the second hair coat of control mice (blue) and mice with β-catenin activated in the DP (CatnEx3, red). Averages ± s.d. are shown. (n= 13 control mice, n=12 CatnEx3 mice, at least 250 hairs per mouse analyzed). Scale bar: 25 micrometers.