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Table 2 Chip characteristics of selected data sets studied.

From: G-stack modulated probe intensities on expression arrays - sequence corrections and signal calibration

Data Set HG133A_S Mouse ENCODE HG133P_Z HG133A_Z
GEOa GSE1133 GSE12545 GSE6292 GSE3061 GSE3061
Chip type HG U133A MG 430 2.0 Human Tiling HG U133plus2 HG U133A
# probes × 106 b ≈ 0.5 ≈ 1.0 ≈ 1.5 ≈ 1.2 ≈ 0.5
# probesetsb 22,300 45,101 300, 000c 54,675 22,300
% absentd 61.9% 63.1% 94.8% 54.9% 42.8
log LN chip e 2.0 2.3 1.1 1.94 2.09
log I max e 4.48 4.71 3.45 4.32 4.45
%(GGG)1 probesf 2% 1.9% 2% 2% 2%
%(GGG)1 probesetsf 20% 19% - 20% 20%
  1. aGene expression omnibus (GEO) accession number
  2. bnumber of probes and of probesets per array
  3. cpseudo sets are assembled using five consecutive probes
  4. dpercentage of absent probes per array
  5. emean value of the logged non specific background intensity and logged saturation intensity
  6. fpercentage of probes containing the (GGG)1-motif and of probe sets containing at minimum one of these probes