nonhuman protein function protein protein interaction Animals 64 controlled study 60 priority journal 60 protein expression 52 article 46 unclassified drug 46 Humans 40 mouse 38 animal cell 36 human 34 Mice 32 Article 26 metabolism 24 Protein Binding 22 animal 22 protein localization 22 protein binding 20 animal experiment 18 genetics 16 in vivo study 16 protein analysis 16 signal transduction 16 Polysaccharides 14 animal model 14 animal tissue 14 apoptosis 14 protein domain 14