the results indicate that viable cultures of macrophages were obtained since : 1 ) the cells stained intensely for nonspecific esterase , 2 ) they possessed fc receptors on their cytoplasmic membranes , 3 ) they were capable of phagocytosing 3h-labeled e. coli and carbon particles , and 4 ) they were highly resistant to the effects of trypsin to induce detachment from the culture substrate .
C0034805
fc receptors
C0007603
cytoplasmic membranes