Fig. 4: Progress in reducing the fraction of missing proteins for all human chromosomes.

a The percentage of missing proteins (PE2,3,4) relative to all protein-coding genes (PE1,2,3,4) plotted annually according to human Chrs 1–22, X and Y ___location from the first neXtProt release (23-08-2011) to the latest HPP reference release (17-01-2020). b The relative percentage (magenta bars) and absolute number (green dots) of all neXtProt PE2,3,4 missing protein entries specifically upgraded to PE1 since 2011 across Chrs 1–22, X and Y.