{HEAD ~ This defined basal nutrient medium} is very effective in {TAIL ~ both high and low density culture} of a wide variety of cell lines and cell types 
is very effective in
{ HEAD ~ This defined basal nutrient medium } is very effective in { TAIL ~ both high and low density culture } of a wide variety of cell lines and cell types
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH