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Table 1 List of metabolite standards used to assess the effect of the analytical performance of chemical derivatization

From: Metabolic fingerprinting of Lactobacillus paracasei: the optimal quenching strategy

Metabolite class Compounds in the class
Neutral amino acids Alanine, isoleucine, leucine, valine, glycine, asparagine, glutamine, γ-aminobutyric acid
Basic amino acids Arginine, lysine
Acidic amino acids Aspartate, glutamate
Aromatic amino acids Proline, phenylalanine, tyrosine, tryptophan
Sulfur-containing amino acids Serine, threonine, methionine
Monocarboxylic acids Lactic acid, pyruvic acid
Dicarboxylic acids α-Ketoglutaric acid, succinic acid, tartaric acid, malic acid, fumaric acid
Tricarboxylic acids Citric acid
Nucleobase Adenine, uracil, guanine, thymine, cytosine, xanthine, hypoxanthine
Nucleosides Adenosine, 2’-deoxyadenoisine, uridine, 2’-deoxyuridine, guanosine, thymidine, cytidine, xanthosine, inosine, 2’-deoxyxanthine, adenosine triphosphate
Monosaccharides Glucose, galactose, fructose, mannose
Disaccharides Lactose, sucrose, maltose
Sugar alcohols Mannitol, sorbitol
Vitamins Thiamin, nicotinic acid, nicotinamide, pyridoxine, pyridoxamine, pantothenic acid, myo-inositol, biotin
Phosphylated sugar Glucose-6-phosphate, fructose-1,6-biphosphate
Internal standards d 4-Alanine, decane, tetracosane