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pSMAD5 is broadly expressed in the compartments of prenatal sheepskin. (A) pSMAD5 is expressed in the dermis, epidermis and primary wool follicle placodes and associated dermal condensates. (B–E) pSMAD5 is expressed in the precursor cells, buds and ducts of apocrine sweat glands and is also expressed in all skin compartments. (F) The negative control is displayed without applying the primary antibody in immunohistochemistry. A–D Bar, 50 μm. E and F Bar, 100 μm.
