| 摘要 |
A process for producing a stable culture of a microorganism of the genus Lactobacillus containing at least one extrachromosomal genetic element which, on the one hand, stimulates its ability to produce lactic acid from lactose and which, on the other hand, controls its ability to metabolize N-acetyl-D-glucosamine, which comprises cultivating the microorganism in a nutrient medium of which the principal source of assimilable carbon is N-acetyl-D-glucosamine. |
