Biological Timings tutorial


Online tutorial from the NCF Center for Biological Timing. Covers mainly human clocks and phenomenon such as shift work, jet lag and medical applications but has some information on the rhythms in other organisms and about other types of rhythm.

Biological Clock Web Site


This site provides an introduction to biological clocks for those with little or no knowledge of the subject. Subjects include: The properties of a biological clock, the genetics of the clock in Drosophila and a glossary of biological clock terms.

Phase Response Curves: What can they tell us about Circadian Clocks?


Site all about phase response curves including how they are measured, plotted and their uses.

Circadian Rhythms by Prof. Van Gooch


This site contains some information on phase response experiments and includes a phase response curve atlas.

Circadian Technologies Inc


Circadian Technologies Inc. is a research and consulting firm specialising in shift working scheduling to reduce the adverse effects of shift work. Site includes a learning centre with tutorials on biological clocks, sleep and sleep disorders, and alertness.

Circadian Rhythms and Oscillating Reactions


Information on circadian rhythms and oscillating chemical reactions, including the oscillating metabolism of yeast. Also contains a nice recipe for cookies containing circadian crickets!

Biological clocks in Mosquitoes


This site covers information on the biological clocks in Mosquitoes. Includes photoperiodograms and detailed information on mosquito biological clocks.

#1 Body Clock and Biologic Rhythms


Basic information about circadian and other types of rhythm (e.g. infradian and circannual rhythms).

#1 Circadian Rhythms


Site includes information on how circadian clocks have a role in metabolism, eating and sexual disorder and about jet lag.

National Institute on Mental Health

How Biological Clocks work


Fact sheet on biological clocks. Information is quite basic but it covers jet lag, bipolar disorder and Drosophila biological clocks.


The NCF Center for Biological Timing


The NCF Center for Biological Timing is a collaboration between Brandeis University, Rockefeller University, Northwestern University and the University of Virginia for research into biological clocks. Site covers information on research projects, the center’s outreach programme for high school students and a Biological Timings tutorial (see above).

The Millar Research Group


Research group at Warwick University working on how the circadian clock is constructed and adjusted, and how it affects plant life. Also information on the use of luciferase reporter genes in plant circadian research and movies of plant rhythms.

Isabelle Carré’s Research Group


Warwick University research group studying circadian and photoperiodic timings in Arabidopsis. Includes information on molecular mechanisms and the identification of clock mutants in Arabidopsis.

Center for Sleep and Circadian Biology


CSCB integrates research on circadian rhythms and sleep with the aim of understanding and treating circadian dysfunctions.

Dunlap Lab


Research group headed by Dr Jay Dunlap, studying circadian clocks in the fungus Neurospora crassa. Contains information on Neurospora clock genes, especially frq and wc-1 and wc-2.

Carl Johnson laboratory


Research group studying timing mechanisms in cyanobacteria, eukaryotic algae and higher plants. Includes pdf files of many of their published papers.

Coupland Group


  Research group focussing on the molecular mechanisms used by plants to detect photoperiod and use it to trigger flowering.

Society for Research on Biological Rhythms


The Society for Research on Biological Rhythms was formed in 1987 to promote the advancement of basic and applied research in all areas of biological rhythms.

Laboratory of Genetics. Biological Clock Research.


Research group headed by Prof. Michael W Young at Rockefeller University. Research interests are related to clock and neurogenesis genes in Drosophila.