Table 3

Comparison of IC50 values of RPR112378 and RPR115781 after incubation with several sulfhydryl molecules

TreatmentIncubation timeTubulin assay IC50
h μM
RPR112378
 None1
 10 mM cysteine17.5
 10 mM cysteine4810
 400 mM cysteine110
 400 mM cysteine2415
 10 mM dithiothreitol115
 10 mM dithiothreitol2420
 1 M β-mercaptoethanol120
 10 mM lysine11
RPR115781
 None6
 1 M β-mercaptoethanol16