in order to assess whether the potential ability of heart ventricular muscle and liver to metabolise substrates such as alanine , aspartate and lactate varies as the sheep matures and its nutrition changes , the activities of the following enzymes were determined in tissues of lambs obtained at varying intervals between 50 days after conception to 16 weeks after birth and in livers from adult pregnant ewes : lactate dehydrogenase ( ec 1.1.1.27 ) , alanine aminotransferase ( ec 2.6.1.2 ) , pyruvate kinase ( ec 2.7.1.40 ) , pyruvate carboxylase ( ec 6.4.1.1 ) , phosphoenolpyruvate carboxykinase ( gtp ) ( ec 4.1.1.32 ) , malate dehydrogenase ( ec 1.1.1.37 ) , aspartate aminotransferase ( ec 2.6.1.1 ) and citrate ( si ) -synthase ( ec 4.1.3.7 ) .
C0024544
malate dehydrogenase
C0030016
ec