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2-Chloro-4-nitrophenyl alpha-D-mannopyranoside is a substrate used to measure the alpha-mannosidase activity. This enzyme plays a crucial role in the lysosomal degradation of asparagine-linked carbohydrate cores of glycoproteinsis. The use of 2-Chloro-4-nitrophenyl alpha-D-mannopyranoside in diagnostic assays is important as a deficiency in alpha-mannosidase leads to the accumulation of mannose-rich oligosaccharides in lysosomes, causing a range of health problems collectively known as alpha-mannosidosis.

6-Bromo-2-naphthyl 2-acetamido-2-deoxy-b-D-glucopyranoside is a chromogenic substrate used for the detection of chitinase activity. Upon hydrolysis by chitinase, it releases a yellow-brown color, which is easily detected by spectrophotometry. This substrate has been used to study chitinases in various organisms, including bacteria, fungi, and insects. It can also be used to quantitate chitinase activity in various biological samples.