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. 1997 May 5;137(3):685–701. doi: 10.1083/jcb.137.3.685

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Immunohistochemical localization of laminin α chains in adult mouse kidney (a–e), heart (f–j), and lung (k–o). All five α chains were present in adult BLs, but each chain was distributed in a distinct pattern. α1 was found only in kidney mesangium and in a subset of tubular BLs (primarily proximal) (a). α2 was present in mesangium (b), in a subset of corticomedullary tubular BLs (b, inset), and in cardiomyocyte BLs (g). α3 was detected in kidney papillary BL (c) and in lung alveolar BL (m). α4 was absent from renal cortex (d) but found in capillaries of both the renal medulla (not shown) and heart (i), and in alveolar BLs in lung (n). α5 showed the most widespread expression: in all kidney BLs—glomerular, tubular, and arterial (e); in heart blood vessels and in some cardiomyocyte BLs (j); and in lung alveolar BL (o). G, glomerulus; M, mesangium; bv, blood vessel. Bar, 50 μm.