ell ular ▁properties , ▁not ▁including ▁morph ology , ▁for ▁sorting ▁a ▁heter ogeneous ▁mixture ▁of ▁cells . ▁This ▁is ▁the ▁most ▁common ▁method ▁of ▁currently ▁separ ating ▁cells ▁and ▁involves ▁enc aps ulating ▁cells ▁into ▁small ▁liquid ▁dro ple ts ▁and ▁select ively ▁l abeled ▁with ▁electric ▁charges ▁and ▁sorted ▁by ▁an ▁external ▁electric ▁field . ▁F AC S ▁devices ▁are ▁fairly ▁expensive ▁and ▁are ▁typically ▁found ▁in ▁only ▁lab ▁environments ▁but ▁have ▁the ▁ability ▁to ▁sort ▁at ▁rates ▁around ▁ 5 0 , 0 0 0 ▁cells / second ▁and ▁with ▁high ▁performances ▁with ▁some ▁reaching ▁pur ities ▁at ▁or ▁above ▁ 9 9 . 9 %, ▁however , ▁they ▁are ▁large ▁and ▁util ize ▁high ▁press ures ▁that ▁can ▁comprom ise ▁cell ▁vi ability . ▁F AC S ▁has ▁several ▁systems ▁that ▁work ▁together ▁to ▁achieve ▁successful ▁sorting ▁of ▁events ▁of ▁interest . ▁These ▁include ▁fluid ics , ▁opt ics , ▁sorting ▁systems . ▁Util izing ▁flu ores c ence , ▁users ▁can ▁identify ▁a ▁particular ▁population ▁of ▁events ▁within ▁a ▁sample ▁containing ▁many ▁differently ▁character ized ▁cells . ▁This ▁technology ▁is ▁used ▁extens ively ▁in ▁h emat ology ▁l abs . ▁However , ▁research ers ▁can ▁use ▁a ▁variety ▁of ▁flu ores cent ▁d yes ▁to ▁design ▁multi - color ▁pan els ▁to ▁achieve ▁successful , ▁simultane ous ▁sorting ▁of ▁multiple , ▁precisely ▁defined ▁cell - types . ▁Di agram ▁A ▁shows ▁F AC S ▁of ▁negative ▁cell ▁selection ▁( undes ired ▁group ) ▁and ▁diagram ▁B ▁shows ▁F