Figure 2.

(a) Venn diagram comparison of proteins identified from this work and those from the previous work [26]; (b) KEGG pathway analysis of the 1,579 human milk proteins; (c) Venn diagram comparison of proteins quantified in technical replicate 1 and 2; (d) Principal component analysis of the quantitative human milk proteomes from all 10 donors in this study. Each donor contributed to milk at 0-mo (red), 1-mo (blue), 3-mo (green), 6-mo (purple), 9-mo (orange) and 12-mo (aqua) of lactation. Samples are grouped by ellipsoid according to lactation time. One dot in each of the 6 lactation stages represents the quantitative dataset from each of the 10 donors. The axes represent three principal components (PC#1, PC#2, PC#3) labeled with the percent of dataset variation explained by each.