{"type":"root","children":[{"type":"paragraph","children":[{"type":"text","value":"PAX-2 is a homeogene strongly expressed during kidney development. PAX-2 gene is expressed in the metanephric mesenchyma after ureter bud induction and is a key factor for the mesenchyma-epithelium conversion. Animals transgenic for PAX-2 have severe renal abnormalities and cysts but no solid tumoral features. Anti-PAX-2 can be used to distinguish Ovarian Serous Papillary Carcinoma (PAX-2 positive) from Primary Breast Carcinoma (PAX-2 negative). It can also be used to distinguish Clear Cell Renal Carcinoma (positive) from Hepatocellular Carcinoma (negative)."}]}]}