Karina Xavier, Instituto Gulbenkian de Ciencia (image) Instituto Gulbenkian de Ciencia Share Print E-Mail Caption Karina Xavier is the head of the Bacterial Signaling Lab. Credit Howard Hughes Medical Institute Usage Restrictions Use of this image is embargoed until Janaury 24, 2012 at 6am EST. Share Print E-Mail 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.