Photomicrographs of mouse SCN sections immunostained with PER1 and PER2 antibodies.

Abstract

<p>The left column shows sections from wild-type mice euthanized at ZT12. The center column shows sections from wild-type mice euthanized at ZT0. The right column shows sections from mice lacking the target antigen (“mutant") at ZT12. The antigen, host number (R = rabbit; GP = guinea pig) and antibody concentration used for each antibody is indicated. Scale bar, 100 µm.</p