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Table 1 In 4G-probes, the effect of the location of the G-spot on the average value of the correlation coefficient.

From: G-spots cause incorrect expression measurement in Affymetrix microarrays

Location of G-spot, l

1

2

3

4

5

6

7

8

9

10

11

Number of probes

331

173

220

229

265

203

225

224

218

340

187

Average correlation

0.68

0.38

0.36

0.38

0.30

0.34

0.40

0.41

0.47

0.59

0.49

Location of G-spot, l

12

13

14

15

16

17

18

19

20

21

22

Number of probes

185

207

181

194

234

235

244

251

284

224

250

Average correlation

0.55

0.60

0.60

0.59

0.58

0.56

0.56

0.51

0.46

0.44

0.45

  1. (l = 1 means that both probes have a 5' end that starts with GGGG; l = 22 means that both probes have a 3' end that finishes with GGGG).