6AZQ Structural and biochemical characterization of a non-canonical biuret hydrolase (BiuH) from the cyanuric acid catabolism pathway of Rhizobium leguminasorum bv. viciae 3841 Rhizobium leguminosarum bv. viciae (strain 3841) 6XJ4 Triuret Hydrolase (TrtA) from Herbaspirillum sp. BH-1 C162S bound with biuret Herbaspirillum sp. BH-1 6XJM Biuret Hydrolase (BiuH) from Rhodococcus sp. Mel C169S bound with biuret Rhodococcus sp. Mel