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Table 1 Human amino acid repeat variants

From: Mutation patterns of amino acid tandem repeats in the human proteome

Repeat type

Number of repeats with EST coverage*

Average codon homogeneity

Average number of ESTs

Polymorphic repeats (%)

Polymorphic up-down (%)

Gap/total repeat variants (%)

All

2,227

0.49

27.4

115 (5.2)

110-106 (4.8)

60/137 (44%)

A

249

0.37

35.5

14 (5.6)

16-9 (5)

8/17 (47%)

E

487

0.55

28.8

31 (6.4)

20-20 (4.1)

15/35 (43%)

G

193

0.48

27.7

12 (6.2)

13-12 (6.5)

4/15 (26%)

L

210

0.55

26.8

5 (2.4)

11-13 (5.7)

4/5 (80%)

P

312

0.41

26.8

17 (5.4)

17-17 (5.4)

3/22 (14%)

S

315

0.41

22.7

9 (2.9)

10-8 (2.8)

2/11 (18%)

K

134

0.5

36.9

7 (5.2)

6-10(5.9)

3/7 (43%)

Q

137

0.66

19.7

14 (10.2)

8-9 (6.2)

15/17 (88%)

  1. *Number of repeats covered by at least four ESTs. Number of polymorphic sequences immediately upstream (up) and downstream (down) of repeats; the percentages in parentheses were calculated by taking them together. Number of repeat polymorphic variants involving gaps with respect to the total number of variants.