Distribution of DEP abundances. (A-D) DEPs at specific time points were relative to day 3 as the baseline. The x-axis indicates the fold-change (ratios) of proteins based on the logarithm with base 2. The y-axis indicates the protein ID. The candidate DEPs were indicated in red (up-regulated) or green (down-regulated), with the absolute value of log2 (protein fold-change) >1.5. The range of log-fold changes in panel B and C were much wider than panel A and D, revealed more DEPs change their expression pattern in d9 and d12 compared with d3 and d16. That may show us the right direction to focus their functions in the regulation of HG activity.