Table 1. Amplitudes of retinal Per1::luc or PER2::LUC rhythms in mice of different genotypes.

Gene	Genotype	Rhythmic power(Mean ± SEM)	P value	Statistical analysis	Sample number
Per1	Per1+/+	667±29 (c)		One-way ANOVAwith Fisher’s LSDpost hoc test	10
	Per1+/−	509±17 (b)	P<0.001		12
	Per1−/−	229±13 (a)	P<0.001		12
Per2	Per2+/+	275±18		One-way ANOVAwith Fisher’s LSDpost hoc test	13
	Per2+/−	263±24	P>0.05		16
	Per2−/−	214±24	P>0.05		10
Per3	Per3+/+	647±47		One-way ANOVAwith Fisher’s LSDpost hoc test	12
	Per3+/−	722±36	P>0.05		10
	Per3−/−	676±70	P>0.05		10
Cry1 & Cry2	Cry1+/+Cry2+/+	618±13 (b)		NonparametricKruskal-Wallis testfollowed by Dunnett'sT3 post hoc test	10
	Cry1+/−Cry2+/+	483±43	P>0.05		8
	Cry1−/−Cry2+/+	313±22 (a)	P<0. 01		14
	Cry1+/+Cry2+/−	692±16 (b)	P>0.05		10
	Cry1+/−Cry2+/−	612±30	P>0.05		13
	Cry1−/−Cry2+/−	321±29 (a)	P<0. 01		20
	Cry1+/+Cry2−/−	759±13 (b)	P>0.05		12
	Cry1+/−Cry2−/−	719±19 (b)	P>0.05		22
	Cry1−/−Cry2−/−	166±8 (a)	P<0.001		14
Clock	Clock+/+	646±13 (c)		One-way ANOVAwith Fisher’s LSDpost hoc test	10
	Clock+/−	486±20 (b)	P<0.001		10
	Clock−/−	210±15 (a)	P<0.001		8

Letters indicate significant difference with a<b<c. P values are for comparisons to wild-type mice. A minimum of three animals were sampled for each genotype.