Method prepares L-threonine production 472 t-23 97 of strain Escherichia coli by fermentation and using this: relying partially on isoleucine when preparing 472 T-23 of L-threonine-producing strain Escherichia coli using therefore fermentation method, resistance with the gene and threonine operon that carry in plasmid is to penicillin, it is possible that generating in medium and isoleucine concentration boundary, appropriately combined the 3 to 1. of guarantee0 gram per liter of corn is precipitous, molass21:02570-91 11:279975

摘要

in the fermentation preparation threoninu with strain escherichia coli 472 t - 23, partially dependent on isoleucine, with plasmids bearing threoninovu00fd operon and gene for resistance to penicillin.can be achieved in a medium with concentrations of isoleucine within secure an adequate combination of corn steepu, molasses and peptuonu, 0.3 to 1.0 g / 1production to 73 g / 1 threoninu for 40 h in the conversion of 38% sacharu00f3zy.u0155