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Thymosin β4 localization in tubulointerstitial fibrosis. (A and B) Localization of thymosin β4 in fibrotic kidneys at day 14 in wild type mice (A). Serial section staining for α-smooth muscle actin (SMA) (B) indicates that thymosin β4 is expressed on myofibroblasts. (C and D). Thymosin β4 in fibrotic kidneys at day 14 in wild type mice (C). Staining for F4/80 on the adjacent section (D) indicates that thymosin β4 is expressed on macrophages (×400, immunostaining as indicated).
