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Immunohistochemical analysis of cannabinoid receptor expression in human normal skin and skin tumors. (a) Immunolocalization of CB1 and CB2 receptors. (b) Controls without primary Ab (only with secondary biotinylated anti-rabbit Ab), as well as controls with the Ab-blocking peptides, are shown (see Methods and Results for explanation). The source of samples is described in Methods. BCC, basal cell carcinoma; SCC, squamous cell carcinoma; Hf, hair follicle.
