Evaluation of gene expression data generated from expired Affymetrix GeneChip® microarrays using MAQC reference RNA samples

Table 1 New data generated for this study with Affymetrix GeneChip^® microarrays

Type of microarrays	Sample¹	Hybridization name	Scaling factor	Averaged correlation²
		A1	4.58
	A	A2	4.76	0.994
U133A (expired in 2004)		A3	4.29
		B1	4.40
	B	B2	4.46	0.995
		B3	5.17
		A1	2.64
	A	A2	2.95	0.998
U133Plus2		A3	2.72
		B1	2.78
	B	B2	2.97	0.997
		B3	2.97

¹Sample A: Stratagene’s Universal Human Reference RNA; Sample B: Ambion’s Human Brain Reference RNA; ²Averaged Pearson correlation coefficient for pair-wise log₂ intensity comparison across the three replicates.

ISSN: 1471-2105