Wang, Z., Gu, C., Colby, T., Shindo, T., Balamurugan, R., Waldmann, H., et al. (2008). β-Lactone probes identify a papain-like peptide ligase in Arabidopsis thaliana. Nature Chemical Biology, 4(9): 1, pp. 557-563. Retrieved from http://dx.doi.org/10.1038/nchembio.104.