Figure 1.CLOCK-controlled gene expression in skin has a circadian pattern and correlates with synchronized hair growth cycles. A schematic
diagram showing rhythmic circadian expression of clock controlled gene Dbp
over different phases of the hair growth cycle (solid line). The circadian
amplitude of Dbp expression correlates with progression of the hair
follicle cycle with highest expression during telogen (broken line). Skin
histology for representative hair growth cycle stages is shown below. Note
that this schematic does not show the actual length of each phase of the
hair growth cycle.