TABLE 1.

Functional categories of genes differentially regulated by H₂O₂^a

Gene category	No. of genes with:
	Increased expression	Decreased expression
Amino acid transport and metabolism	26	44
Carbohydrate transport and metabolism	5	15
Cell cycle control, mitosis, and meiosis	2	2
Cell motility	0	2
Cell wall/membrane biogenesis	13	11
Coenzyme transport and metabolism	7	7
Energy production and conversion	32	32
Function unknown	3	4
Hypothetical protein	129	45
Inorganic ion transport and metabolism	16	5
Lipid transport and metabolism	14	12
Nitrogen regulation	1	0
Nucleotide transport and metabolism	7	28
Posttranslational modification, protein turnover, chaperones	17	13
Replication, recombination, and repair	26	9
RNA	0	15
Secondary metabolite biosynthesis, transport, and catabolism	9	4
Secretion	0	8
Signal transduction mechanisms	9	4
Stress	3	0
Toxin	0	1
Transcription	36	11
Translation	3	86

^aFunctional gene categories were determined using clusters of orthologous groups. Categories were refined when possible based on reported gene functions.