This was the first cyclic metabolic pathway to be  discovered.
This was the first cyclic metabolic pathway to be  discovered. The amino acid arginine is hydrolyzed to ornithine  and the nitrogenous product for which this cycle is named. The  remainder of the cycle leads to the re-formation of arginine from  ornithine. FTP, name this cycle, proposed in 1932 by Hans Krebs  and Kurt Henseleit, whose namesake product was first synthesized  in a lab by Friedrich Wohler.
This was the first cyclic metabolic pathway to be  discovered.
{urea cycle}