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Ernie vs ChatGPT: Baidu and Google's AI bots are in the game yourstory.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from yourstory.com Daily Mail and Mail on Sunday newspapers.
Social media firms have faced scrutiny from Congress over their impact on young users, but parents who have lost kids to online harm are now leading the charge ....
You Can Stop Instagram From Tracking You Across Other Sites and Apps lifehacker.com.au - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from lifehacker.com.au Daily Mail and Mail on Sunday newspapers.
L-Methionine is the only bulk amino acid that has not been industrially produced by the fermentation method. Due to highly complex and strictly regulated biosynthesis, the development of microbial strains for high-level l-methionine production has remained challenging in recent years. By strengthening the l-methionine terminal synthetic module via site-directed mutation of l-homoserine O-succinyltransferase (MetA) and overexpression of metAfbr, metC, and yjeH, l-methionine production was increased to 1.93 g/L in shake flask fermentation. Deletion of the pykA and pykF genes further improved l-methionine production to 2.51 g/L in shake flask fermentation. Computer simulation and auxotrophic experiments verified that during the synthesis of l-methionine, equimolar amounts of l-isoleucine were accumulated via the elimination reaction of cystathionine γ-synthetase MetB due to the insufficient supply of l-cysteine. To increase the supply of l-cysteine, the l-cysteine s ....