Gastroesophageal Junction (IMAGE) University of Würzburg Caption Tissue section from the gastroesophageal junction of a mouse, illustrating the spatial distribution of various cell types through immunostaining: CDH1 in green identifying epithelial cells, POSTN in red and ACTA2 in white delineating distinct fibroblast subpopulations, with nuclei stained blue. Credit Chumduri-LaB Usage Restrictions None License Original 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.