Abstract:
When pseudomonas syringae(KCTC 1832) is cultivated in the fermentor including industrial microorganisms, yeast extract, soy pepton, and corn-steep liquor, the following processes can increase the productivity of the microorganism. (a) the process of limiting dissolved oxygen to 10-50 % with oxygen membrane; (b) the process of providing medium to maintain above 1% of glucose concentration; (c) the process of lowering culture temp. to 20-24 deg.C with dissolved oxygen maintained below 1ppm.
Abstract:
A gene for coding ice nucleating protein is prepd. by culturing Pseudomonas syringae AL, KCTC 1832, separating its chromosomal DNA, treating with restriction enzyme Bgl II/EcoRI, applicating in agarose gel electrophoresis, moving nytran membrane, hybridizing with 32P-oligonucleotide, 5'- CCGTAACCGGCGGTCAACGTGC3' to obtain the selected DNA fragment, inserting into the Bam HI/EcoRI site of vector pBR 322 to obtain the recombinant DNA, amplifying in E. coli, separating the plasmid DNA, treating with Bgl II/ EcoRI to obtain the ice nucleus activating gene clone pGINP-1, inserting to the E. coli KCTC 8475 (I). The (I) is useful for prevention of freezing and/or frost damage of frozen food prodn. and preservation.
Abstract translation:用于编码冰核蛋白的基因是制备的。 通过培养丁香假单胞菌AL,KCTC 1832,分离其染色体DNA,用限制酶Bgl II / EcoRI处理,应用于琼脂糖凝胶电泳,移动nttran膜,与32P-寡核苷酸杂交,5'-CCGTAACCGGCGGTCAACGTGC3'获得所选择的DNA片段 插入载体pBR 322的Bam HI / EcoRI位点,得到重组DNA,扩增大肠杆菌,分离质粒DNA,用Bgl II / EcoRI处理,得到冰核激活基因克隆pGINP-1,插入 大肠杆菌KCTC 8475(I)。 (I)可用于预防冷冻食品的冻结和/或霜冻损伤。 并保存。