Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Principal component analysis (PCA) score plots (A), the orthogonal projection to latent structures discriminant analysis (OPLS-DA) scores plots (B), and permutation tests (C) for liver metabolites. Three groups are distinguished: summer-collected frogs, green; winter-collected frogs, blue; and Quality Control (QC) samples, red.
