Fig. 1From: Integrative analysis of the Pekin duck (Anas anas) MicroRNAome during feather follicle developmentMasson trichrome staining of feather follicle. a 11EM; b 15EM; c 20EM; d 1Â DB, e 4WK; f 10WK. 1. Cell proliferation to form the feather bud; 2. feather sheath; 3. a single layer of follicle; 4. pulp and vessel; 5. thickened epithelium; 6. keratinized barb ridgeBack to article page