Table 2. Statistics measuring the experimental error of reference heat shock yeast slides after four different normalisation methods.

	AN+RN	SN+RN	AN+RN+FN	iAN+RN+FN
Range	2.0263	1.5939	0.9725	0.9964
Standard deviation	0.1970	0.0838	0.0682	0.0758

We show the range and standard deviation of the difference between log ratios (base 2) estimated from replicated spots.