A proteomic profiling platform has been developed that applies 5,034 single-stranded DNA aptamers (validated SOMAmers™) to assay 4,783 human proteins (4,137 distinct human gene targets), 48 non-human vertebrate proteins and 203 bacterial and viral protein targets covering a broad range of protein functional classifications (Supplemental Figure 1). The intra-assay and inter-assay CVs are presented in the Results section. As compared to the prior iteration of the platform, this version covers a broader array of intracellular proteins (approximately 30%).