HeLa Cells Humans 44 human 44 controlled study 32 human cell 32 article 24 Animals 22 HeLa cell line 22 metabolism 22 priority journal 18 unclassified drug 18 Mice 16 chemistry 16 nonhuman 16 signal transduction 16 Article 14 animal 14 HeLa cell 12 Microscopy, Fluorescence 12 fluorescence microscopy 12 mouse 12 Cell Survival 10 HEK293 Cells 10 protein protein interaction 10 Cell Line 8 animal cell 8 cell survival 8 drug effects 8 enzyme activity 8 genetics 8