A methylguanine that is guanine substituted by a methyl group at position 7. It is a metabolite obtained during the methylation of DNA.

Chemical properties

Chemical formula Net charge Average mass
C6H7N5O 165.15288

Recommended notation

Name 7-methylguanine
Abbreviation 7mG


Origin Function Functional detail Organisms References
natural damage cytotoxic
  • Escherichia coli
  • Homo sapiens
  • Mesocricetus auratus
  • Mus musculus
  • Rattus norvegicus