Fig. 7.

Tracking dermal cells in feather follicle. (A-D) Tracking dermal cellular flow in growth-phase feather follicle. DiI labeling of early growth-phase DP (A), resting-phase DP (B), early growth-phase DS (C) and labeling DS using the Tol2 system (D). Left column, schematic showing the labeling position. Pink shows the opened follicle sheath surrounding the feather follicle. Yellow and green indicate the injection site. Insets show the follicles immediately after DiI labeling. Second and third columns, fluorescent signals after indicated time intervals. Right column, schematic summarizing cell lineage tracing results. (E) Homeostasis of LRDCs and TA cells during feather cycling. DP, dermal papilla; DS; dermal sheath; pPP; peripheral pulp.