TABLE 2.

Experimental factors influencing microarray spot signal intensities

Factor	Identification	Codes	Type/effect
Slide	S	s = 1, 2	Random
Hybridization	H	h = 1-6	Fixed
Well	W	w = 1, 2	Random
Bacteria	B	b = 1-10	Fixed
Probe	P	p = 1, 2	Fixed
Error (uncertainty)	E	e = 1-3	Random