The Nutritional Requirements of Lactic Streptococci Isolated from Starter Cultures. I. Growth in a Synthetic Medium

摘要: Summary A nutritional investigation of 35 strains 8. lactis and S. cremoris isolated from commercial starter cvdtures show that they required proline, isoleucine, valine, leucine, histidine, glutamine, methionine, all except one arginine. Cystine, tryptophane, aspartic acid, serine were not for growth any the investigated. All other amino acids by or more in order to initiate growth. Glutamic acid could substitute glutamine 10 studied. Niacin, pantothenic biotin Pyridoxine thiamin necessary eases maximum response. The requirement riboflavin was varied. Most stimulated than one-third it Liver fraction L markedly rate initial effect especially pronounced case slow strains.