Bacteriophage MS2
（重定向自MS2 phage）
![MS2 capsid](/Images/godic/202501/28/Ms2capsid_surface4927.png")
![caption](/Images/godic/202501/28/MS2_phage_gene_map.svg4927.png")
![MS2 capsid structure. The three quasi-equivalent conformers in the structure are labelled blue (chain a), green (chain b) and magenta (chain c).](/Images/godic/202501/28/Ms2capsid4927.png")
The bacteriophage MS2 is an icosahedral, positive-sense single-stranded RNA virus that infects the bacterium Escherichia coli and other members of the Enterobacteriaceae. MS2 is a member of a family of closely related bacterial viruses that includes bacteriophage f2 and R17.