“…In L. helveticus, aminotransferase activities have been described against aromatic amino acids, branched-chain amino acids and Met as well as 11 other amino acids (Helinck, Le Bars, Moreau, & Yvon, 2004;Klein, Maillard, Thierry, Lortal, 2001;Thage, Houlberg, & Ardö , 2004). The peptidase biosynthesis of L. helveticus is under the control of nutritional regulation (Hé bert, Raya, & De Giori, 2000;Kenny, FitzGerald, O'Cuinn, Beresford, & Jordan, 2003;Simova & Beshkova, 2007). The biosynthesis of aminotransferases has received less attention though it has been shown to be influenced by the growth medium in Lactobacillus rhamnosus (Williams, Noble, Tammam, Lloyd, & Banks, 2002).…”