The Proteobacteria变形杆菌(Vol.2) 。Class alphaproteobacteria a变形杆菌纲 。Class Betaproteobacteria B变形杆菌纲 。Class Gammaproteobacteria y变形杆菌纲 Class Deltaproteobacteriaδ变形杆菌纲 。Class Epsilonproteobacteria s变形杆菌纲 CHEN FENG,MICROBIOLOGY,SJTUChen Feng, Microbiology, SJTU The Proteobacteria变形杆菌(Vol.2) • Class alphaproteobacteria 变形杆菌纲 • Class Betaproteobacteria 变形杆菌纲 • Class Gammaproteobacteria 变形杆菌纲 • Class Deltaproteobacteria 变形杆菌纲 • Class Epsilonproteobacteria 变形杆菌纲