Structure of Bacteriophage different sizes and shapes T3 phage icosahedral head 0x60nm.+面体 tail 20nm long T4 phage dsDNA T1 phage head 80x 11Onm dsDN tail 110nm long head 54x54nm tail 140nm long M13 phage filamentous BSDNA helical 80010nmStructure of Bacteriophage ◼ different sizes and shapes icosahedral 二十面体 filamentous