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Objectives To achieve consecutive conversion from creatinine to urea and sarcosine using creatininase and creatinase encapsulated in spores of Saccharomyces cerevisiae. Results Creatininase encapsulated into the spore wall was produced and its specific activity was 3.4 ± 0.4 U/mg. By deletion of OSW2 gene, which causes a mild spore wall defect, the activity was increased to 10.9 ± 0.5 U/mg. Compared...
A dicistronic expression vector was constructed for Chinese hamster ovary (CHO) cells that produce both selectable marker-DHFR (dihydrofolate reductase) gene and recombinant antibody cDNA from a single primary transcript via differential splicing. The vector was derived from a pDHL vector and contained the human constant region cDNA so that any human-mouse chimeric antibodies could be expressed. The...
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