1. A Timely Expression Profile
F.Rob Jackson, Andrew J. Schroeder 
Developmental Cell 
Volume 1, Issue 6, Pages (December 2001)
DOI: /S (01)

2. Figure 1
A Fanciful Depiction of Some Clock-Controlled Processes, Indicated on the Hampton Court Palace Clock
Figure is based in large part on the phase analysis presented in Claridge-Chang et al. Arrows indicate the different processes; ZT denotes zeitgeber time, or subjective time of day.
Developmental Cell 2001 1, DOI: ( /S (01) )