Table 3.

Selection of Enzymes for which Xanthene-Based Probes have been Reported

Enzyme Class	Specific Enzyme
Serine proteases [271]	Plasmin [272], Thrombin [272], Subtilisin [37], Tripeptidyl peptidase I [273], Hepatitis C viral protease [274], chymotrypsin [274]
Metalloproteases	Aminopeptidases [275,276]
Cysteine proteases	Caspases [269,270], Cathepsin B [274], Cathepsin C [277], Cathepsin K [278], SARS main protease [279], papain [274]
Glycosidases	β-glucosidase [213]
Phosphodiesterase/Phosphatases [225,280]
Lipase/esterase [86]
Other hydrolases	β-N-Acetylglucoaminidase [281],
Transferases	Glutathione transferase [282]
Oxoreductases	cytochrome P450s [246]