The enzymatic hydrolysis colorimetric mechanism and characteristics of DGGR lipase substrate

Accurate determination of lipase activity is of great significance for the diagnosis of pancreatic diseases in clinical biochemical testing. DGGR, as a highly specific lipase chromogenic substrate, provides a reliable solution for in vitro quantitative detection of lipase activity. Its molecular design is exquisite, and the enzymatic color development mechanism is clear. It has been widely used in biochemical analyzers and microplate detection platforms.

Chemical Structure and Characteristics of DGGR Lipase Substrate

The chemical name of DGGR is 1,2-di-O-moleyl-rac-glycerin-3- (6-methylisoquinoline glutarate), with a CAS number of 195833-46-6. The appearance is a red to dark red powder or solid, easily soluble in organic solvents such as DMSO and ethanol. The purity of the product is not less than 95%, and it needs to be stored in a dark, dry and sealed condition at minus 20 degrees Celsius. The shelf life is 24 months.
The molecular structure of DGGR has been carefully designed, and its core functional groups can be specifically recognized by lipase. As a hydrophobic component, the laurel chain facilitates the dispersion and emulsification of substrates in aqueous systems, providing a suitable interface environment for enzymatic reactions. Glutaric acid bridging connects the chromophore with the glycerol backbone, forming the site of action for lipase. This structural combination enables DGGR to be specifically recognized and cleaved by lipase, while exhibiting good chemical stability.

Two step enzymatic colorimetric mechanism

The color reaction of DGGR follows a clear two-step process. The first step is specific hydrolysis. Lipase recognizes DGGR substrate molecules in the reaction system, hydrolyzes their ester bonds, and generates unstable dicarboxylic acid ester intermediates. The action of lipase has high substrate specificity, as it can cleave the ester bond between the laurel chain and the glycerol backbone, releasing intermediate products.

The second step is spontaneous hydrolysis and chromophore release. The intermediate is unstable and undergoes spontaneous hydrolysis under reaction conditions, releasing methyl halides. Methyl halide is a chromophore with a blue purple color and strong light absorption at specific wavelengths. This hydrolysis process does not require the involvement of additional enzymes and can be carried out under reaction conditions of room temperature or 37 degrees Celsius.

Detection principle and quantitative method

After the color reaction is completed, quantitative detection is carried out by colorimetric method. Methyl halides exhibit characteristic absorption peaks at wavelengths of 570 nanometers or 580 nanometers. During the reaction process, as the lipase continuously hydrolyzes the DGGR substrate, methyl thiophanate is continuously released, and the absorbance of the reaction system gradually increases. Under fixed reaction conditions, the rate of increase in absorbance is directly proportional to the concentration of lipase activity in the sample. By comparing with standard samples or standard curves, the unit of lipase activity in the test sample can be calculated.

Application scenarios and technological advantages

DGGR substrates are suitable for various application scenarios, including the determination of lipase activity in clinical serum samples, the detection of lipase related indicators in food quality monitoring, and the evaluation of lipase activity in microbial samples. Its technological advantages are reflected in the following aspects: high detection sensitivity, which can meet the quantitative needs of low enzyme activity samples; Easy to operate, no need for complex sample pretreatment steps; Compatible with biochemical analyzers and microplate detection platforms, facilitating automated detection.

For clinical diagnosis, lipase activity measurement is an important basis for the diagnosis of acute pancreatitis and the differential diagnosis of acute abdomen. The detection results provided by DGGR substrates have good reliability and stability, and can maintain linear response over a wide range of enzyme activities. DGGR substrates have application value in the field of lipase activity detection due to their clear color development mechanism, good substrate specificity, and wide application compatibility. The DGGR substrate produced by Hubei Xindesheng Material Technology Co., Ltd. has a purity of not less than 95%, good batch stability, and can meet the quality requirements of lipase substrates for clinical testing and scientific research experiments. If you need it, please contact me immediately!