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p21 localizes in both the cytoplasm and nucleus of adult skeletal muscle. Frozen sections of human muscle were analyzed for the localization of p21 by immunofluorescence using the polyclonal C-19 antibody (1:200) and goat anti-rabbit IgG Alexa Fluor 594 (1:500); nuclei were counterstained with DAPI. Scale bars = 50 um.
