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Vitamin A signaling through its active form retinoic acid (RA) plays a critical role during kidney development and vitamin A deficiency in the rat induces renal hypoplasia. Here, we describe the distribution of four enzymes of the RA synthetic pathway (aldehyde dehydrogenases ALDH1A1–3 and ALDH8A1) and two enzymes of the degradative pathway (CYP26A1 and CYP26B1) in the developing rat metanephros....
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