A L-serine producing bacterium strain,named as MB200,was isolated from digester remainder in Longan,Guangxi.This strain can grow in the medium with methanol as sole carbon source.Traditional taxonomy,assays of its 16S rDNA sequence homology identified MB200 as Methylobacterium sp.The optimum culture conditions for the strain were:temperature32℃,pH8.0,methanol concentration 1.25%.Resting cells system was set up for producing Lserine by MB200.After optimizing the resting cells culture conditions,the optimum c...