Zhao, Q., et al. Quinetides: diverse post-translational modified peptides of ribonuclease-like storage protein from Panaxquinquefolius as markers for differentiating Ginseng species 10.1016/j.jgr.2019.05.010

Peptides have diverse and important physiological roles in plants and are ideal markers for species identification. It is unclear whether there are specific peptides in Panax quinquefolius L. (PQ). The aims of this study were to identify Quinetides, a series of diverse posttranslational modified native peptides of the ribonuclease-like storage protein (ginseng major protein), from PQ to explore novel peptide markers and develop a new method to distinguish PQ from Panax ginseng.