The cell population includes {HEAD ~ a single cell suspension} of {TAIL ~ ES cells} encapsulated within an alginate polyelectrolyte microenvironment 
of
The cell population includes { HEAD ~ a single cell suspension } of { TAIL ~ ES cells } encapsulated within an alginate polyelectrolyte microenvironment
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH