Hi, I am making a ligand in Jligand (figure attached) and have a question about valency of nitrogen. Jligand puts three hydrogens on nitrogen N1 when the ligand is regularized. Should there be two hydrogens or three? -- Thanks, Abhinav ______________________________________ Abhinav Kumar, Ph.D. The Joint Center for Structural Genomics MS99, SLAC National Accelerator Laboratory 2575 Sand Hill Rd, Menlo Park, CA 94025 (650) 926-2992