The antibody coated beads may be placed in a gradient fashion such that {HEAD ~ each layer} binds to and selects {TAIL ~ a subset} of cells from the entire sample population 
The antibody coated beads may be placed in a gradient fashion such that { HEAD ~ each layer } binds to and selects { TAIL ~ a subset } of cells from the entire sample population
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH