Fig. 4
From: Assessment of geographical origin and production period of royal jelly by NMR metabolomics
PCA score-plot (13.7% of total variance explained) based on 1H NMR spectra of Royal Jelly samples of Italian (Bologna, Grosseto and Andria samples are represented by blue squares, circles and triangles, respectively; produced the 8th of July 2016) and Chinese (yellow rhombi; distributed in Italy in 2016) geographical origin. The name and orthogonal direction of most significant loading vectors involved in the differentiation among RJ types are reported along the plot borders (more details are reported in Supporting Fig. S9)