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The article discusses the use of exome sequencing (ES) as a potential alternative to kidney biopsies in diagnosing undetermined kidney diseases (UKD). While kidney biopsies are invasive and carry risks, recent studies have shown that genetic variants may explain a significant portion of UKD cases. ES involves sequencing the coding regions of all protein-coding genes in the human genome and has been successful in diagnosing certain genetic kidney disorders. However, the study emphasizes that ES does not provide a definitive diagnosis in all cases, and kidney biopsies should still be considered in certain situations. [Extracted from the article]