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Table 1 The expanded epigenetic alphabet. This includes the known modifications to cytosine and symbols for each guanine complementary to a modified nucleobase. Symbol colours indicate recommended display colour in representations such as genome browser tracks

From: Modeling methyl-sensitive transcription factor motifs with an expanded epigenetic alphabet

Covalent cytosine modification

Complement

Abbreviation

Name

Symbol

Name

Symbol

5mC

5-Methylcytosine

Guanine:5-methylcytosine

5hmC

5-Hydroxymethylcytosine

Guanine:5-hydroxymethylcytosine

5fC

5-Formylcytosine

Guanine:5-formylcytosine

5caC

5-Carboxylcytosine

Guanine:5-carboxylcytosine