mutation and mutagens

base tautomerization of an A

transition

deamination of a C

transition

Depurination of a G

transition and transversion

oxidation of a G

transversion

Bisulfan methylates of a G

transition

Ethidium bromide intercalates between and C-G and an A-T

insertions or deletions

chemical x causes depyrimidation (like depurination, but a pyrimidine is lost)

transitions or transversions