these cells initially are negative for nonspecific esterase cytoplasmic activity , lack the monocyte marker mo.2 , fall into smaller , nonmonocytic cell size areas , as determined by fluorescence-activated cell sorter ( facs ) -assisted size analysis , and differentiate into macrophages under nonstimulatory culture conditions ( in the absence of exogenous colony stimulating factors , less than 0.1 ng/ml endotoxin , and growth in suspension ) .
C0108768
monocyte
C0024432
differentiate