Table 2.

Number of Periodic Genes Identified by the Original Experimenters, Wichert et al. (2004), and Chen

Cell type	Experiment	Experimenter	Wichert et al. (2004)	Chen
C. crescentus	bacteria	Laub et al. (2000), identified 553 periodic genes	44	43
Yeast	alpha	Spellman et al. (1998),	468	471
Yeast	cdc15	total of 800 periodic genes	766	779
Yeast	cdc28	identified in all of these four	105	27
Yeast	Elution	yeast cell cycle experiments	193	695
Human fibroblasts	N2	Cho et al. (2001), 700 periodic	0	1
Human fibroblasts	N3	genes identified in N2 and N3	0	0
Human HeLa	Score1	Whitfield et al. (2002),	0	6
Human HeLa	Score2	total of 800+ periodic genes	134	153
Human HeLa	Score3	identified in these five	6043	5770
Human HeLa	Score4	Human Cancer cell line	56	17
Human HeLa	Score5	experiments	0	0