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单词 RNA phage
释义

RNA phage

英语百科

Bacteriophage

The structure of a typical myovirus bacteriophage
Diagram of the DNA injection process
In this electron micrograph of bacteriophages attached to a bacterial cell, the viruses are the size and shape of coliphage T1.
Diagram of a typical tailed bacteriophage structure

A bacteriophage /ˈbækˈtɪər.i.ˌf/ (informally, phage /ˈf/) is a virus that infects and replicates within a bacterium. The term is derived from "bacteria" and the Greek:φαγεῖν (phagein), "to devour". Bacteriophages are composed of proteins that encapsulate a DNA or RNA genome, and may have relatively simple or elaborate structures. Their genomes may encode as few as four genes, and as many as hundreds of genes. Phages replicate within the bacterium following the injection of their genome into its cytoplasm. Bacteriophages are among the most common and diverse entities in the biosphere.

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