... ê 2009 The Authors Journal compilation ê 2009 FEBS Solution structure of hirsutellin A – newinsightsinto theactive site and interacting interfaces of ribotoxinsAldino Viegas1, Elias Herrero-Gala´n2, ... basic pI and common tertiarystructure [4,13,14]. They fold into an a + b structurewith a central five-stranded antiparallel b-sheet and anKeywordscytotoxic protein; NMR; ribonucleases;RNase T1; ... recognition andribonucleolytic activity. J Mol Biol 299, 1061–1073.14 Yang X & Moffat K (1996) Insightsinto specificity ofcleavage and mechanism of cell entry from the crystalstructure of the highly...