Table 1

Hybridization signal strength of five genes found to be expressed using the array tube but not using the Affymetrix chip, respectively, compared with the results of quantitative PCR experiments (non-stimulated Coga cells). Array tube: relative transmission values, normalized overall. Affymetrix chip: relative fluorescence value, normalized overall

Gene
Affymetrix chip
Array tube
PCR
Quantitative RT-PCR

PAI-1
not present
0,53

4,34*10-7 ng
MMP7
not present
0,52

1,02*10-6 ng
MMP8
not present
0,47
positive

CST5
not present
0,89
positive

CTSK
273,8+)
0,43

8,13*10-6 ng

+) this value is below the cut off of 300.

Schüler et al. BMC Genomics 2006 7:144   doi:10.1186/1471-2164-7-144