Vectors Uses for Animal Cell Culture
Cos cell line is

derivative of non-permissive CV-1 monkey cell line
derivative of permissive CV-1 monkey cell line
cohesive end site of phage λ
cohesive initial site of phage λ

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Vectors Uses for Animal Cell Culture
Retroviruses have advantage for being used as vector for animal cells because

infection does not lead to cell death, infected cells produce virus over an indefinite period
they cover a wide host range
viral gene expression is driven by strong promoters
All of these

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