title: Mobility of oligopeptides on normal-phase silica: effect of positional isomerism.
mesh_terms: D002850:Chromatography, Gel; D007536:Isomerism; D009842:Oligopeptides / Q000138:chemical synthesis; D012822:Silicon Dioxide; D013329:Structure-Activity Relationship
chemical_list: D009842:Oligopeptides; D012822:Silicon Dioxide