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What is micro injection? How it is helpful in recombinant DNA technology?

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Micro injection:

It is the use of a glass micropipetle to inject a liquid substance at a microscopic or borderline macroscopic level. The target is of ten a living cell but may also include intercellular space.

Microinjection is a technique of delivering foreign DNA into a living cell (a cell, egg, oocyle of animals) through a glass micro pittle. One end of gass micropipette is heated until the glass becomes some what lialvified. It is quickly stretched which forms a very finde tip at the heated end. The tip of the pipette attains to about 0.5 mm diametre which resembles an injection needle. The process of delivering foreigh DNA is done under a powerful microscope. Cells to be micro injected are place in container.

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