Figure 4.

The relative intracellular enzyme activity in monocytic cells after 3 days of culture; untreated control – left column – and LPS or PMA-treated – middle and right columns, respectively. The cells were unlabelled (a) or labelled with probes for esterase (b), 5′-nucleotidase/phosphatase (c), peroxidase (d), cathepsin C (e) and cathepsin D (f). Data acquired are presented as graphs, where the position of the negative control is shown under (a). The results are representative from one experiment out of three replicates, and the numbers noted in each plot are the geometric means of the fluorescent peak values.