Chick mandibular promonence (IMAGE) The Company of Biologists Caption Surface-rendered whole-mount chick mandibular prominence in wild type chick embryos, stained in blue for DAPI and in red for Sox9, an osteochondroprogenitor marker. Credit Christian Louis Bonatto Paese, Evan C. Brooks, Megan Aarnio-Peterson, Samantha A. Brugmann. Usage Restrictions Image may only be used with appropriate caption or credit. 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.