C H O N S Ball and Stick Stick Spacefill Reset Nod factor (1) for S. melioti on M. sativa (alfalfa) Highlighting Features 3-mer of beta 1,4 linked N-acetyl-D-glucosamine N-acyl (16:2 fatty acid, cis configuration between 9/10 and 12/13) on C-2 on non-reducing terminal sugar. Sulfate on O-6 position of reducing terminal sugar Acetyl group at O-6 position of non-reducing terminal sugar