extracellular space 16 nonhuman 16 priority journal 14 Extracellular Space 13 article 12 controlled study 10 Animals 8 animal cell 8 Enzymes 6 Models, Biological 6 Protein Binding 6 Rats 6 animal 6 calcium 6 comparative study 6 cytology 6 metabolism 6 physiology 6 rat 6 unclassified drug 6 Animal 4 Article 4 Calcium 4 Cell Differentiation 4 Culture Media 4 Potassium 4 Saccharomyces cerevisiae 4 Signal Transduction 4 Support, Non-U.S. Gov't 4 Time Factors 4