Table 5. Percentage of transcripts assigned to different KEGG functional categories.

Category	Bulk communitya				HTCC2255b				Polaribacterc
	0500 hours	1000 hours	1800 hours	2200 hours	0500 hours	1000 hours	1800 hours	2200 hours	0500 hours	1000 hours	1800 hours	2200 hours
Unassigned	51	49	48	54	31	30	33	40	56	54	51	60
Metabolism	30	35	32	29	35	41	37	31	27	32	29	27
Genetic information processing	18	13	17	14	23	20	20	15	17	15	21	13
Environmental information processing	4.4	4.5	4.9	4.7	15	14	16	19	3.0	2.3	3.2	2.6
Cellular processes	2.3	2.6	2.6	3.3	1.9	2.4	2.4	2.5	2.0	2.3	1.9	2.4

Abbreviation: KEGG, Kyoto Encyclopedia of Genes and Genomes.

^aPercentage of sequences with significant hits in the KEGG genes database.

^bPercentage of total sequences assigned to Rhodobacterales sp. HTCC2255.

^cPercentage of total sequences assigned to either of the sequenced Polaribacter genomes.