Fig. 5
a The frequency of differences in the amino acids and their metabolites detected at 6 time points in a day, and b the number of amino acids that differed at the different detection times during the day. c The ratio of each amino acid/metabolite to the total amino acids and their metabolites in the serum. Different amino acids and their metabolites are identified by different colours. Higher total amino acid content in the serum, higher urea content in the serum, and lower aspartic acid content was observed in the model group than in the control group. d The absolute concentration of amino acids and their metabolites at ZT8