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Table 2 Summary of mutations induced in sequences of three to five adenine nucleotides (A-runs) in the gpt gene in the small intestine of Msh2-KO mice

From: Characteristic mutations induced in the small intestine of Msh2-knockout gpt delta mice

Nucleotide position of A-run within the gpt gene

Original sequence

Mutated sequence

Number of mutants and independent mutations

Vehicle control

KBrO3 administered

7–12

AAAAA

AAAAd

3 (1)

6 (3)

88–90

AAA

AAd

1 (1)

2 (1)

173–175

TTT

TTC

0

2 (1)

179–181

TTT

TTC

0

1 (1)

TTTT

0

1 (1)

214–216

AAA

AAAA

0

1 (1)

223–225

AAA

AAd

1 (1)

2 (2)

315–318

AAAA

AAAd

4 (1)

3 (3)

325–327

TTT

TTd

0

1 (1)

342–345

AAAA

AAAd

2 (1)

5 (2)

AAAAAA

0

2 (1)

AAAAA

0

2 (2)

AAAC

1 (1)

2 (2)

Number of mutants in A-runs

12(6)

30 * (21 *)

Total number of mutants in gpt

107 (66)

149 (97)

  1. * P < 0.05, significantly different compared with vehicle control by Fisher’s exact test.
  2. Numbers in parentheses indicate the numbers of independent mutations.
  3. “d” indicates base deletion.