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A Bacillus sp.YCJS strain showing phytase activity was isolated, and the phytase-encoding gene was cloned and expressed in Escherichia coli. The 1,149-bp full-length gene encoded a 26-residue putative signal peptide and a 356-residue mature protein. The molecular weight was estimated to be 47.5 kDa by sodium dodecyl sulfate-polyacrylamide gel(More)
The complicated interactions among tasks lead to iterations in product design and development. To maintain the market share, enterprises should effectively manage their product development project and bring their products to market as early as possible. The objective of the paper is to investigate how to analyze design iteration. Firstly, the improved(More)
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