The legend currently reads as:
“Figure 2 Contour plots of the four subclasses of reference standards, including (A) ten sugar metabolites, (B) twenty amino acids, (C) eight fatty acids, and (D) nine sugar alcohols. The x- and y-axes represent the retention times in the first and second dimensions, respectively. The red-labeled metabolites indicate the co-eluted compounds.”
And it should read:
“Figure 2 Contour plots of the four subclasses of reference standards, including (A) nine sugar metabolites, (B) ten sugar alcohols, (C) nineteen amino acids, and (D) eight fatty acids. The x- and y-axes represent the retention times in the first and second dimensions, respectively. The red-labeled metabolites indicate the co-eluted compounds.”
Thus, on page 3 of paper, in the sentence of “The standards included 9 sugar alcohols,10 sugars, 20 amino acids, and 8 free fatty acids” should read “The standards included 10 sugar alcohols, 9 sugars, 20 amino acids, and 8 free fatty acids.”
VOLUME 298 (2022) ARTICLE NUMBER 102445