Then, the better fitting models were obtained through fitting analysis by software MATALAB.The aim mutant TK0303 obtained has been potential to be applied to industrial producing, which could produce L-leucine 28.3g/L in the conditions of shake-flask fed-batch fermentation, 26.44g/L in the conditions of 5-liter fermentor batch fermentation and whose genetic character was stable.
The growth circles of RY605、RY606、RY618 were shortened markedly and contents of intracellular riboflavin were increased 79.97%、69.56%、71.09% compared with their starters, respectively. Genetic character of these mutants was stable testified by passage cultivation.
The main research items and results as follows:(1) Rhodotorula glutinis as a starting strain was mutated with UV and diphenylamine as a screening reagent. One carotenoid high producing strain Ruv701 was screened through UV induction of mutation. Genetic character of mutated strain was stable by fermentation test.
Is the frequency of apomeiosis in the Rhodophyta a genetic character
Such ♂♂ also were able to elicit immediate phenotypic changes in their female mating partners, at intensities expected from their genetic character, as previously observed with original parental ♂♂ in this species.
Strain-differences of sensitivity to volatile anesthetics and their genetic character in mice
Based on these results, we are developing a new gene therapy that targets the genetic character of pancreatic cancer, using mutant adenoviruses that are selectively replication-competent in tumor cells.
We surmise that isoprene emission is a genetic character which evolved ancestrally in the oak genus since this is the prevalent emission type in oaks widespread around the world and adapted to different environments.
The spore suspension of Blakeslea trispora was treated with different dosages of ~(60)Co irradiation.The study showed that when 1.5 kGy mutagenic dosage was provided,85% of the spores died,resulting in a good mutagenic effect.By re-screening,a mutant F4-3 was obtained.Compared with the parent strain,its production of CoQ_(10) reached 24.766 mg/L,and the increase rate was 76%,and its genetic character was stable.
采用不同剂量的60Coγ射线对辅酶Q10产生菌——三孢布拉氏霉JSF 4菌株的孢子进行处理。结果表明,诱变剂量1.5 kG y对孢子的致死率为85%,具有较好的诱变效果。经复筛,分离得到了1株F 4-3菌株,其发酵平均单位达24.766 m g/L,较出发菌株提高了76%,且该菌株遗传性状稳定。