Table I Number of identified proteins (Ensembl genes with identical IPI sequence) and peptides in comparison with respective numbers in the ENSEMBL human database

Observable peptides are in silico digested peptides with masses between 0.6 and 4 kDa and no missed cleavages.

Human proteomeIdentified in 11 cell lines
Proteins19,51510,183 (52.2%)
Observable peptides536,593
Observable, sequence-unique peptides506,080
Observable peptides from identified proteins338,496109,862 (32.5%)
Observable, sequence-unique peptides from identified proteins316,585103,869 (32.8%)