Figure 5.

The representative 600 MHz ¹H-NMR spectra of rat liver extracts. Key: 1, isoleucine; 2, leucine; 3, valine; 4, lactate; 5, threonine; 6, acetoin; 7, alanine; 8, arginine; 9, acetate; 10, proline; 11, N-acetylglucosamine; 12, methionine; 13, 2-octenoate; 14, glutamate; 15, pyroglutamate; 16, glutamine; 17, glutathione; 18, dimethylamine 19, lysine; 20, choline; 21, O-phosphocholine; 22, carnitine; 23, sn-glycerol-3-phosphocholine; 24, betaine; 25, taurine; 26, trimethylamine N-oxide; 27, glucose; 28, glycerol; 29, glycine; 30, maltose; 31, fumarate; 32; tyrosine; 33, phenylalanine; 34, formate.