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6.1 RNA editing is another way of<br />

changing the sequence of an mRNA<br />

I. Site specific deamination :<br />

(1)A specifically targeted C residue within<br />

mRNA is converted into U by the<br />

deamination.The process occurs only in<br />

certain tissues or cell types and in a<br />

regulated manner.<br />

(2)Adenosine deamination also occurs in cells.<br />

The enzyme ADAR (adenosine deaminase<br />

acting on RNA) convert A into Inosine.<br />

Insone can base-pair with C, and this change<br />

can alter the sequence of the protein. An ion<br />

channel expressed in mammalian brains is<br />

the target of Adenosine deamination.

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