mice, and rapidly embedded for frozen cross-sectioning. Sections were cut at 5
μm and mounted onto glass slides. Afterwards, Clock components were
immunohistochemically detected. Briefly, the indirect avidin biotin-horseradish
peroxidase visualization method was used (ABC Standard and Elite, Vector Red,
Vector Laboratories, Burlingame, USA). Samples were incubated with the detection
primary antibody at the manufacturer’s recommended concentration.