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. 1998 Jun 29;141(7):1539–1550. doi: 10.1083/jcb.141.7.1539

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Northern blots of mouse claudin-1 and -2 expression. Mouse Multiple Tissue Northern Blot (Clontech) was probed with claudin-1 or claudin-2 cDNA fragments. Claudin-1 mRNAs were detected as major 4.0 kb and minor 1.3 kb bands in all the tissues examined, and were seen in especially large amounts in the liver and kidney. Claudin-2 expression (major 4.0 kb and minor 2.0 kb mRNAs) was restricted to the liver and kidney (with small amounts in the brain).