bacteriophage defined in 1951 yearbacteriophage - bacteriophage (PHAGE);
bacteriophage - A virus that parasitizes bacteria. Consists of polyhedral head, 500 to 1000 Angstrom units across, containing genetic material, DNA (or occasionally RNA), enclosed by a wall of protein which is prolonged into a hollow tail. Initiates infection by attaching itself by tail to wall of bacterial cell. Through enzyme action wall is perforated and bacteriophage DNA passes through into bacterial cell whose synthetic machinery it organizes to make more bacteriophage DNA, and more bacterio-phages. These are released by lysis of host cell. Studies of bacteriophage and their genetic recombination in bacteria have been very fruitful in adding to knowledge of genes and gene action. See also: Lysogeny, Transduction.
near bacteriophage in Knolik
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