RGMa Halts a Growing Axon (IMAGE) Rockefeller University Press Caption An elongating axon tip (left) crumples when it encounters RGMa (right). Credit Hata, K., et al. 2009. J. Cell Biol. doi:10.1083/jcb.200807029. 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.