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GalNAc4-ST1 is expressed throughout normal human epidermis. (A) Immunofluorescence staining of normal human frozen skin sections with a polyclonal antibody raised against GalNAc4-ST1 reveals expression of this protein throughout the epidermis, most predominantly in the granular and cornified layers. The dotted white line depicts the boundary between the epidermis and the dermis. (B) Negative control.
