乳酸链球菌产生的干酪乳杆菌刺激物的鉴定。
Identification of a stimulant for Lactobacillus casei produced by Streptococcus lactis.
作者信息
Branen A L, Keenan T W
出版信息
Appl Microbiol. 1970 Nov;20(5):757-60. doi: 10.1128/am.20.5.757-760.1970.
A compound stimulatory to the growth of Lactobacillus casei was isolated from cell extracts of Streptococcus lactis, purified, and characterized. The stimulant was identified as a small peptide with a molecular weight of approximately 4,500 daltons. The purified peptide gave negative tests for nucleic acids, phosphorus, glucosamine, and carbohydrates. Sixteen amino acids were detected in acid hydrolysates of this peptide. Serine, proline, glycine, alanine, leucine, and glutamic acid were present in hydrolysates in greatest abundance.
从乳酸链球菌的细胞提取物中分离出一种对干酪乳杆菌生长有刺激作用的化合物，对其进行了纯化和特性鉴定。该刺激物被鉴定为一种分子量约为4500道尔顿的小肽。纯化后的肽对核酸、磷、氨基葡萄糖和碳水化合物的检测呈阴性。在该肽的酸水解产物中检测到16种氨基酸。水解产物中丝氨酸、脯氨酸、甘氨酸、丙氨酸、亮氨酸和谷氨酸的含量最为丰富。
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