Nucleus (IMAGE) UT Southwestern Medical Center Caption The image shows a series of suprachiasmatic nucleus slices expressing click beetle green in AVP neurons and click beetle red in non-AVP neurons. As time progresses (spiraling into the image), the AVP (green) and non-AVP (red) neurons luminesce together rhythmically, thanks to the intact genetic clocks of the AVP neurons and exchange of neuronal signals. Digital manipulation of bioluminescence images. Artwork by John Abel and Alta Lewis Millard. Credit Neuron Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.