we studied 5-methylcytosine at the inner cytosine of the sequence c-c-g-g , a common methylation site , using endonuclease mspi ( which cleaves c-c-g-g- and c-mc-g-g ) , and its isoschizomer hpaii ( which cleaves only c-c-g-g ) .
C0049308
5-methylcytosine
C0010843
cytosine