HETEROGENEOUS CIRCULAR DNA ELEMENTS IN VEGETATIVE CULTURES OF Bacillus megaterium*
AUTOR(ES)
Carlton, Bruce C.
RESUMO
DNA preparations from two strains of Bacillus megaterium, one which produces megacin and another that is megacin sensitive, were analyzed by dye-buoyant density centrifugation, cesium chloride gradient equilibrium centrifugation in the absence of dye, zone sedimentation in sucrose, and electron microscopy. Both strains were found to contain a substantial proportion of their total DNA as circular, covalently closed, double helical molecules. These DNA elements were heterogeneous in size and appeared slightly less dense than chromosomal DNA. The physiological role and origin of these elements is unknown at present.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=223385Documentos Relacionados
- ENZYME FORMATION IN PROTOPLASTS OF BACILLUS MEGATERIUM*
- OXYGEN AND NITRIC OXIDE AS MODIFIERS OF RADIATION INJURY IN SPORES OF BACILLUS MEGATERIUM*
- PYROPHOSPHATASE ACTIVITY OF BACILLUS MEGATERIUM SPORE AND VEGETATIVE CELL EXTRACTS
- Nonesterified fatty acids and phospholipids in vegetative form and spores of Bacillus megaterium and Bacillus subtilis.
- Spermidine Biosynthesis During Germination and Subsequent Vegetative Growth of Bacillus megaterium Spores