Table IV.

Relative signal intensities and tissue biases for selected genes involved in hormone metabolism or transport

Locus	Gene Symbol	Description	Log₂ (X versus PC)^a	Log₂ (X versus NV)	Log₂ (PC versus NV)	Tissue Bias, This Report^b	Role in Hormone Metabolism/Transport	Reference
At2g38120	AUX1	Amino acid/auxin permease	1.5*	2.0*	0.6	X	Auxin transport	Bennett et al. (1996)
At1g30040	GA2OX2	GA 2-oxidase	3.6*	4.6*	1.1	X	Gibberellic acid inactivation
At2g22330	CYP79B3	Cytochrome P450, converts Trp to IAOx	−3.3*	−0.9	2.4*	PC	Auxin biosynthesis	Hull et al. (2000)
At1g15550	GA4	GA 3-β-dioxygenase/GA 3-β-hydroxylase	−3.5*	0.8	4.4*	PC	Gibberellic acid biosynthesis	Williams et al. (1998)
At5g19040	IPT5	Adenylate isopentenyltransferase 5/cytokinin synthase	−6.0*	−2.2	3.9*	PC	Cytokinin biosynthesis	Takei et al. (2004)
At3g63110	IPT3	Adenylate isopentenyltransferase 3/cytokinin synthase	−1.2	2.0*	3.2*	X/PC	Cytokinin biosynthesis	Takei et al. (2004)

↵a Log₂ of the signal ratio for the three pair-wise tissue comparisons as described for Table I. Log₂ values representing pair-wise comparisons between significantly different signals are indicated by a single asterisk.
↵b Abbreviations for tissue biases are as described for Tables I and II.