Cells Lacking the Protein Bcl-xL (image) Rockefeller University Press Share Print E-Mail Caption The arrows mark fusing mitochondria in Bcl-xL-lacking cells. Credit Berman, S.B., et al. 2009. J. Cell Biol. doi:10.1083/jcb.200809060. Usage Restrictions None 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.