A beta-keto acid is a type of organic compound that contains both a ketone and a carboxylic acid functional group. The structure features a carbon chain with a carbonyl group (C=O) located at the second carbon atom, hence the name "beta." These compounds play important roles in various biochemical processes, including metabolism. Beta-keto acids are often involved in the synthesis of amino acids and fatty acids. They can also serve as intermediates in the Krebs cycle, a crucial metabolic pathway for energy production in living organisms. Their unique structure allows them to participate in various chemical reactions, making them valuable in both biological and industrial applications.