Bone Marrow with and without Cullin 4A (IMAGE) Indiana University Caption Left panel: normal bone marrow tissue. Right panel: bone marrow with deletion of the Cul4A gene and loss of its protein. Credit Indiana University School of Medicine 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.