Table 1.

Known Arabidopsis Genes with Clock Functions

			Circadian Clock Phenotype
Gene	Locus ID	Function	Loss of Function	Overexpression
CCA1	At2g46830	Single Myb domain transcription factor	Short period	Arrhythmic
CKB3	At3g60250	Casein kinase II regulatory subunit	Not known (gene family)	Short period
CRY1	At4g08920	Blue light photoreceptor	Long period in blue light	Short period in blue light
CRY2	At1g04400	Blue light photoreceptor	Long period in blue light	Short period in blue light
DET1	At4g10180	Repressor of photomorphogenesis	Short period	Not known
ELF3	At2g25930	Unknown	Arrhythmic in continuous light	Long period
ELF4	At2g40080	Unknown	Arrhythmic	Not known
GI	At1g22770	Unknown	Short period, low amplitude	Short period, low amplitude
LHY	At1g01060	Single Myb domain transcription factor	Short period	Arrhythmic
LUX	At3g46640	Myb transcription factor	Arrhythmic	Arrhythmic
PHYA	At1g09570	Red light photoreceptor	Long period in far-red light	Short period in far-red light
PHYB	At2g18790	Red light photoreceptor	Long period in red light, leading phase in white light	Short period in red light, lagging phase in white light
PIF3	At1g09530	Basic helix-loop-helix transcription factor	Wild type	Wild type
PRR3	At5g60100	Pseudo-response regulator	Short period	Wild type
PRR5	At5g24470	Pseudo-response regulator	Short period	Low amplitude, long period
PRR7	At5g02810	Pseudo-response regulator	Long period	Not known
PRR9	At2g46790	Pseudo-response regulator	Long period	Short period
SRR1	At5g59560	Unknown	Leading phase, low amplitude	Not known
TIC		Gene not yet identified	Short period, low amplitude	Not known
TOC1	At5g61380	Pseudo-response regulator	Short period	Arrhythmic
ZTL	At5g57360	F-box protein	Long period	Arrhythmic