protein expression nonhuman 210 priority journal 194 controlled study 192 Animals 184 human 162 article 158 Humans 156 protein protein interaction 128 unclassified drug 124 protein function 122 animal cell 108 metabolism 102 mouse 94 human cell 88 signal transduction 86 Mice 84 animal 84 Article 78 animal experiment 62 female 60 Protein Binding 56 Female 54 enzyme activity 52 male 50 protein binding 50 cell proliferation 46 protein interaction 46 Signal Transduction 44 animal tissue 44