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11 Feb 2009 11:46:45 IST

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What are mitogens?Give examples.

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What are mitogens?Give examples.

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anakonda

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11 Feb 2009 12:15:01 IST

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A mitogen is a chemical substance, usually some form of a protein, that encourages a cell to commence cell division, triggering mitosis.Mitogens trigger signal transduction pathways in which mitogen-activated protein kinase is involved, leading to mitosis.example-Lipopolysaccharide toxin from gram-negative bacteria is thymus independent. They may directly activate B cells, regardless of their antigenic specificity.

N.P. Singh

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Joined: 17 Dec 2008

Posts: 446

12 Feb 2009 17:33:29 IST

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Any substance that induces or triggers mitosis as well as lymphocyte transformation is called mitogen.for example a glycoprotein lectin extracted from the pokeweed i.e. phytolacca americana, also lipopolysaccharides are good mitogens.

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