Kabsch, Wolfgang Emeritus Group Biophysics, Max Planck Institute for Medical Research, Max Planck Society; Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, Max Planck Society;
https://www.sciencedirect.com/science/article/pii/0014579381810484/pdf?md5=0d14774b1e208f48a53335d6126fbddf&pid=1-s2.0-0014579381810484-main.pdf (Any fulltext)
https://doi.org/10.1016/0014-5793(81)81048-4 (Any fulltext)
Suck, D., & Kabsch, W. (1981). X-ray determination of the GDP-binding site of Escherichia coli elongation factor Tu by substitution with ppGpp. FEBS Letters, 126(1), 120-122.