Neuropeptide Y (13-36), amide, human is a neuropeptide Y receptor agonist.

Protein kinase C substrate is a substrate of Protein kinase C, can be used to detect protein. Protein kinase C is a key regulatory element in signal transduction and exerts its effects by catalysing specific substrate phosphorylation.

4-Nitrophenyl β-D-Galactopyranoside is a β-D-galactopyranoside derivative that is a substrate for β-galactosidase and can be used to measure β-galactosidase activity, which can be used in the study of lysosomal storage diseases, obesity, and mucopolysaccharides storage diseases.