article male protein expression controlled study 199 nonhuman 193 priority journal 184 Male 153 Animals 151 animal experiment 143 animal tissue 120 animal cell 111 female 90 mouse 86 Mice 78 animal model 77 human 67 rat 66 Female 64 Humans 61 human cell 55 messenger RNA 54 Rats 50 immunohistochemistry 43 protein function 38 cell proliferation 37 unclassified drug 36 Western blotting 34 RNA, Messenger 32 adult 32 Gene Expression Regulation 30