Peptidatic activity of meconium of 200 newborns and 100 preterm babies. Protein content of meconium is higher in preterm babies than in healthy newborns referred to fresh weight. Enzymatic activity opposite to Gly-D-Leu is higher in term than in preterm newborns. It is on the contrary in the case of alanine-aminopeptidase, dipeptidyl-peptidase IV and the activities opposite to Leu-NA and Arg-NA. The good correlated enzymatic activities opposite the different substances give a hint to the presence of alanine-amino-peptidase (EC 3.4.11.2.)
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