protein protein interaction 53 Article 45 human 44 Humans 35 genetics 31 controlled study 29 nonhuman 24 Proteins 22 unclassified drug 22 metabolism 21 gene expression 16 protein analysis 16 human cell 15 protein function 15 protein expression 14 female 12 Animals 11 Protein-protein interactions 11 human tissue 11 pathology 11 Protein Interaction Maps 10 adult 10 animal 10 chemistry 10 male 10 protein binding 10 Western blotting 9 apoptosis 9 gene expression regulation 9 gene ontology 9