Olfactory Epithelium (IMAGE) The Zuckerman Institute at Columbia University Caption A section of the olfactory epithelium. Cells that express a single specific olfactory receptor gene (Olfr17) are in green and DNA, which labels the nucleus of every cells, is blue. Because of the random choice, cells expressing Olfr17 are scattered throughout the tissue. Credit Kevin Monahan & Adan Horta/Lomvardas lab/Columbia's Zuckerman Institute Usage Restrictions Please contact Zuckerman Institute press office for reprint permissions. 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.