Figure 2
From: Convergent evolution of cysteine-rich proteins in feathers and hair
EDCRP is expressed in the subperiderm and the feathers of the chicken. Leg skin on embryonic day E18 (A, B) and growing feathers (E18) in longitudinal sections (C, D) and cross-sections (E-H) were subjected to in situ hybridization with either anti-sense probes specific for EDCRP mRNA (A, C, E, G) or sense probes as negative controls (B, D, F, H). bl, barbules; der, dermis; epi, epidermis; me, medulla of a barb ridge; per, periderm; sh, feather sheath; sub, subperiderm; pu, pulp. Size bars, 40 μm (A, B, E, F, G, H), 20 μm (C, D).