MOLECULAR CLONING AND FUNCTIONAL ANALYSIS OF AMMONIUM TRANSPORTERENCODING GENES AMTB IN ASSOCIATIVE NITROGEN-FIXING BACTERIUM PSEUDOMONAS STUTZERI A1501 Optimization of Fermentation Conditions of Lipase-producing Pseudomonas stutzeri PS59 and Washing Performance of the Lipase OVEREXPRESSION OF Pseudomonas stutzeri dctB gene in E.coli BL21(DE3) Functional Complement Between General Nitrogen Regulator GlnG in Escherichia coli and General Nitrogen Regulator NtrC in Pseudomonas