Fig. 3From: Protein hydrolysis and fermentation under methanogenic and acidifying conditionsThe concentration of total amino acids and of glycine, alanine, proline and glutamic acid during the first 8 h of anaerobic degradation of gelatine at pH 7, at 35 °C. (Data plotted the mean and standard deviation). Total amino acids (mM) (open circle), glycine (filled circle), alanine (filled triangle), proline (open square), and glutamic acid (filled diamond)Back to article page