Normal Palate Formation (IMAGE) University of Utah Health Caption In a Pax9+/+ embryo at E18.5, normal palatal fusion with parallel rugae arrangement is visible. Credit Rena D'Souza 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.