Random Research Highlight: Catalytic triads:  The catalytic properties of enzymes, such as trypsins, containing the ASP-HIS-SER catalytic triads are deeply investigated for a long time. Serine endopeptidases, cutinases, acetylcholinesterases, cellulases, among other enzymes, contain these triads.  We have shown that solely the geometric properties of just four points in the spatial structure of these enzymes of several hundred amino acids well characterize their family: that is, just four points describe their catalytic properties. Biochemical and Biophysical Research Communications, Vol. 383, No. 4, pp. 417-420, (2009)