![]() Parts 1 and 2: single phage. Part 3: bacteria. Part 4: phage attached to the surface of bacteria. Phage attach to bacteria at the tail end and inject DNA, contained in the head, into the bacteria. Once inside the cell, the viral DNA directs the formation of new phage. The bacterial cell bursts open to release the newly made viruses. Credit: From S. E. Luria and T. F. Anderson, The Identification and Characterization of Bacteriophages with the Electron Microscope. Proceedings of the National Academy of Sciences, Vol. 28, No. 4, April 1942. |