Fig. 2. Distribution of lacZ-positive cells in various compartments of labeled pilosebaceous units. Serial sections of skin of transduced mice following five cycles of induced hair growth, at 37 weeks post-transduction, were analyzed by X-gal staining and the distribution of lacZ-positive clusters in the various compartments of 82 pilosebaceous units was noted. ‘+’ indicates partial or uniform labeling of cells in that compartment. The number of labeled pilosebaceous units in each category is shown in the bottom row.