title: Fractionation of competent Bacillus subtilis cells by sucrose density gradient centrifugation.
mesh_terms: D001412:Bacillus subtilis; D002499:Centrifugation, Density Gradient; D003470:Culture Media; D005827:Genetics, Microbial; D006639:Histidine; D013395:Sucrose; D014170:Transformation, Genetic; D014364:Tryptophan
chemical_list: D003470:Culture Media; D006639:Histidine; D013395:Sucrose; D014364:Tryptophan