2-O-Methylcytosine (CAS No 3289-47-2) is a modified nucleoside primarily used in biomedical research to study genetic and epigenetic mechanisms It originates from cytosine with a methyl group attached to the 2-O position altering its interaction with nucleic acids and proteins This modification affects various cellular pathways including those involved in RNA processing and modification In vitro activities of 2-O-Methylcytosine are typically observed in the nanomolar to low micromolar range depending on specific experimental conditions It is widely used in drug screening cellular models and animal studies particularly in understanding nucleic acid behavior and the impact of methylation on gene expression Experimental concentrations typically depend on the specific research design Researchers employ this compound to elucidate pathways in oncology virology and epigenetics contributing significantly to understanding methylation effects on cellular processes