Table 3.

The most over-represented level 4 GO annotations in the Biological process and Molecular function categories for each of the eight clusters of diurnal genes, using all diurnal genes as background distribution

Cluster	GO level 4 annotation	Count	P value	FDR (%)
Biological process
1	Protein transport	49	1.6e-4	0.2
	Establishment of protein localization	49	2.7e-4	0.4
	Intracellular transport	44	1.3e-3	1.8
	Establishment of cellular localization	44	1.8e-3	2.4
	Cellular localization	44	1.8e-3	2.4
	Vesicle-mediated transport	25	1.2e-2	15
2	M phase	12	3.0e-3	4.1
3	Phosphorus metabolism	44	3.4e-4	0.5
	Biopolymer metabolism	97	1.9e-3	2.5
4	None
5	Response to protein stimulus	8	5.3e-3	7.2
6	Vitamin metabolism	7	1.5e-2	18.6
7	Generation of precursor metabolites and energy	20	1.3e-2	16.6
8	Cellular biosynthesis	25	7.0e-3	9.3
	Antigen processing	4	9.2e-3	12.0
	Macromolecule biosynthesis	17	1.7e-2	21.4
Molecular function
1	Guanyl nucleotide binding	22	1.4e-2	17.0
2	None
3	None
4	None
5	Voltage-gated ion channel activity	11	5.7e-4	0.8
	Alkali metal ion binding	8	5.4e-3	6.9
	Calcium ion binding	19	1.0e-2	12.7
	Ion channel activity	12	2.1e-2	24.9
6	None
7	None
8	None