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<p>donor.</p>

<p><big> Classification </big></p>
<p><big> Substrate </big></p>
<p>MTases can be divided into three different groups on the basis of the chemical reactions they catalyze:<br/>
* m6A - those that generate <a href="page.php?w=N6-methyladenine">N6-methyladenine</a> <br/>
* m4C - those that generate <a href="page.php?w=N4-methylcytosine">N4-methylcytosine</a> <br/>
* m5C - those that generate <a href="page.php?w=C5-methylcytosine">C5-methylcytosine</a> </p>

<p>m6A and m4C methyltransferases are found primarily in prokaryotes (although recent evidence</p><p>
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