TET Proteins (IMAGE) La Jolla Institute for Immunology Caption TET proteins helps steer stem cells toward the neuronal lineage during early embryogenesis. Left: Control cells express neuronal markers such as Sox1 (shown in green) and Tuj1 (shown in red). Right: In the absence of TET proteins, stem cells fail to express any neuronal markers. Both: Cell nuclei are shown in blue. Image: Credit Courtesy of Dr. Xiang Li, La Jolla Institute for Allergy and Immunology. 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.