Table 1. Probe pair analysis for concordant and discordant genes.

		cDNA	Direct
All present genes
	Average no. of positive probe pairs	10.0	10.0
	Average no. of negative probe pairs	0.8	1.3
	Mean average difference	2224.6	2492.8
Fold change <–2
	Average no. of positive probe pairs	9.2	11.4
	Average no. of negative probe pairs	0.9	0.9
	Mean average difference	1520.9	4762.8
Fold change >+2
	Average no. of positive probe pairs	9.9	8.4
	Average no. of negative probe pairs	0.8	1.8
	Mean average difference	2056.5	747.2