Abstract
1. By means of van Slyke's amino-N measuring method the combination between amino acid or peptide with glucose at pH 7, 8 and 9 are investigated during a period of 1 or 2 days.
2. In the case of amino acid the amount of combination runs parallel with pH.
In the case of glycylglycin, on the contrary, the amount of combination at pH 9 is less than that at pH 7 and that at pH 8, until the lapse of about 12 hours and about 28 hours respectively.
In the case of 1-leucylglycylglycin, the amount of combina-tion at pH 9 is less than that at pH 7 even after the lapse of 75 hours, and, moreover, during the first 5 or 6 hours the amount at pH 8 is also less than that at pH 7.
3. When fructose is used in place of glucose, the amount of combination is far less than with the case of glucose.
The author wishes to express his sincere thanks to Prof. S. Kakiuchi for his interest and advice throughout this in-vestigation.
