HIV's Hidden Crucial Cutting Point (IMAGE) European Molecular Biology Laboratory Caption For HIV to mature, a crucial cutting point has to be severed. EMBL scientists determined the cutting site's 3-D structure in whole HIV particles, and found that it is hidden in a position where the virus' cutting machinery can't sever it. So for the virus to mature, the structure first has to change, to expose that cutting point. Credit IMAGE: Florian Schur/EMBL Usage Restrictions EMBL press and picture releases including photographs, graphics, movies and videos are copyrighted by EMBL. They may be freely reprinted and distributed for non-commercial use via print, broadcast and electronic media, provided that proper attribution to authors, photographers and designers is made. 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.