Literature citations for protein-protein interactions. (A) The total number of literature citations linked to PPIs. (B) The percentage of PPIs in databases corresponding to 1, 2, 3, 4, or ≥5 literature citations per interaction is shown. The scale is modified as shown to provide a better view of the distribution of proteins with two or more citations per interaction.
Mathivanan et al. BMC Bioinformatics 2006 7(Suppl 5):S19 doi:10.1186/1471-2105-7-S5-S19