Xian-Meng Wu

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Thermal stability and other functional properties of Trichoderma reesei endo-1,4-beta-xylanase II (XYNII; family 11) were studied by designed mutations. Mutations at three positions were introduced to the XYNII mutant containing a disulfide bridge (S110C-N154C) in the alpha-helix. The disulfide bridge increased the half-life of XYNII from less than 1 min to(More)
Escherichia coli JM103 carrying the expression plasmid pMTC48, repressor plasmid pRK248, and protection plasmid pEcoR4 was grown in a 60-L working volume airlift tower loop reactor on M9 minimal medium. Production of fusion protein SpA::EcoRI was induced by a temperature shift from 30 to 38 (optimum), 40, or 42 degrees C. The following parameters were(More)
Stabilities of native and cross-linked crystalline forms of Streptomyces rubiginosus glucose isomerase were compared in buffer and in 45% glucose/fructose solutions. The cross-linked crystalline form of the enzyme was more stable in the presence of substrate while in a buffer solution the native enzyme was more stable. Inactivation of native enzyme in(More)
The copy numbers of the expression plasmids (pRTF309+ and pMTC48), the repression plasmids (pcI857 and pRK248cI) and the protection plasmid (pEcoR4) in recombinant E. coli JM103 were investigated. In the absence of the protection plasmid, the copy number of the expression plasmid dropped; in its presence, the copy numbers of the expression plasmids(More)
A high oleic acid rapeseed material M15 (derived from Xiangyou 15 variety) has been received more attention for its significant effect for human health. And it has almost the same physiological characteristic with Xiangyou 15 variety. To find out the difference between high oleic acid rapeseed material and Xiangyou 15 seedling, a comparative proteomic(More)
SPA::EcoRI fusion protein was produced by Escherichia coli JM103 carrying the multicopy expression plasmid pMTC48, the multicopy repressor plasmid pRK248, and the multicopy protection plasmid pEcoR4 in a 60-L working volume airlift tower loop reactor on M9 minimal medium with glucose. Cell mass concentration, total cell count, number of colony-forming(More)
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