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Double immunostaining of granulysin and T/NK cell markers in reactive tonsils. CD4-positive cells are granulysin negative (a); a few CD8-positive cells co-expressed granulysin (b). The majority of CD56-positive cells were granulysin positive (c). In all images, granulysin is in blue with the exception in b which is in brown. No counterstaining is performed. [O.M.: a– c × 20]
