Changes in the concentrations of free amino acids in milk during growth of Lactococcus lactis indicate biphasic nitrogen metabolism

alanina alanine amino acids arginina arginine cells cellule crecimiento croissance free amino acids glicina glycine (amino acid) growth isoleucina isoleucine lactococcus lactis lait leche leucina leucine methionine metionina milk milk protein nitrogen metabolism ornithine ornitina peptide peptides proteolisis proteolyse proteolysis serina serine threonine treonina valina valine