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==Structure of Viruses==

==Structure of Viruses==

The fundamental component of a viron is the nucleoprotein core that contains the genetic ability to infect host cells and replicate inside them. The genome of viruses able to infect vertebrates is enclosed by a capsid and is haploid in all cases except retroviruses in which they are diploid. The nuclear material and the capsid are called the nucleocapsid. Capsids are made up of multiples of one or more types of protein subunits and it is this orderly arrangement of types of protein that creates a symmetrical structure.  

The fundamental component of a virion is the nucleoprotein core that contains the genetic ability to infect host cells and replicate inside them. The genome of viruses able to infect vertebrates is enclosed by a capsid and is haploid in all cases except retroviruses in which they are diploid. The nuclear material and the capsid are called the nucleocapsid. Capsids are made up of multiples of one or more types of protein subunits and it is this orderly arrangement of types of protein that creates a symmetrical structure.  

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Viruses also have a layer of protein called the "matrix" which is between the nucleocapsid and the envelope. The matrix layer provides the overall virus structure with increased rigidity. For more information on the structure of viruses, please see [[Viral Structure]].

Viruses also have a layer of protein called the "matrix" which is between the nucleocapsid and the envelope. The matrix layer provides the overall virus structure with increased rigidity.  

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