Several enzymatic triglyceride methods measure the production or consumption of which substance?

Several enzymatic triglyceride methods measure the production or consumption of which substance?

• A. NADH
• B. Fatty acids
• C. Glycerol
• D. Diacetyl lutidine

Answer: (C)

Enzymatic triglyceride assays measure the glycerol released when triglycerides are hydrolyzed. Lipase first breaks triglycerides into glycerol and free fatty acids. The glycerol then enters a specific enzyme cascade: glycerol is phosphorylated by glycerol kinase to glycerol-3-phosphate, which is oxidized by glycerol-3-phosphate oxidase to generate hydrogen peroxide. The hydrogen peroxide is detected through a colorimetric reaction, so the signal reflects how much glycerol was present, and thus how much triglyceride was in the sample. Fatty acids are not directly measured in this approach, and NADH is only a cofactor in the detection steps rather than the primary analyte, while diacetyl lutidine is not involved in this triglyceride measurement pathway.

Enzymatic triglyceride assays measure the glycerol released when triglycerides are hydrolyzed. Lipase first breaks triglycerides into glycerol and free fatty acids. The glycerol then enters a specific enzyme cascade: glycerol is phosphorylated by glycerol kinase to glycerol-3-phosphate, which is oxidized by glycerol-3-phosphate oxidase to generate hydrogen peroxide. The hydrogen peroxide is detected through a colorimetric reaction, so the signal reflects how much glycerol was present, and thus how much triglyceride was in the sample. Fatty acids are not directly measured in this approach, and NADH is only a cofactor in the detection steps rather than the primary analyte, while diacetyl lutidine is not involved in this triglyceride measurement pathway.