AA => 0.0876441581694274,
  AC => 0.050382172379123,
  AG => 0.0726163599915327,
  AT => 0.0680375702421899,
  CA => 0.0744871531142771,
  CC => 0.0586105336500266,
  CG => 0.0121528607767549,
  CT => 0.072435600501404,
  GA => 0.0616385773891699,
  GC => 0.0479870698325412,
  GG => 0.0597908940638241,
  GT => 0.0509971288041851,
  TA => 0.0549250240353684,
  TC => 0.0606918145805057,
  TG => 0.0758458048289572,
  TT => 0.0902412592104137,