helper virus


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helper virus

[′hel·pər ‚vī·rəs]
(virology)
A virus that, by its infection of a cell, enables a defective virus to multiply by supplying one or more functions that the defective virus lacks.
References in periodicals archive ?
Construction of retroviral vector and determination of retroviral titre: After confirming orientation ofthe HSV-tk gene cloned in pLTKSN it was co-transfected into 293 cells with an ecotropic helper virus pEcoLandau to produce ecotropic viral particles.
Little is known about these enigmatic bits of genetic material; they seem to exist in a sort of dormant state in leaf cells, incapable of replicating without the assistance of a fully formed--and often disease-causing--"helper virus.' The satellites are of interest to plant pathologists because they can influence the severity of the disease caused by their respective helper viruses.
This helper virus can be transferred into any suitable host cell making it a packaging cell.