4-Nitrophenyl beta-D-Glucuronide [Substrate for beta-Glucuronidase] TCI N0618

TCI N0618 4-Nitrophenyl beta-D-Glucuronide is a chromogenic substrate for the enzyme beta-glucuronidase. The molecule consists of glucuronic acid attached to 4-nitrophenol through a beta-glycosidic bond. When beta-glucuronidase cleaves this bond, it releases 4-nitrophenol, which turns yellow under alkaline conditions and can be measured by spectrophotometry. It is a standard substrate for measuring beta-glucuronidase activity in biochemistry, microbiology, pharmacology and plant biotechnology research, where laboratories need a reliable way to quantify how active the enzyme is.

The substrate is widely preferred because results are simple, fast and quantitative to read. The reaction product is coloured on its own, so researchers do not need an extra derivatization step before measurement. This keeps assay protocols short and lowers the chance of handling errors. The substrate is specific to the beta-glucuronide bond, which helps separate beta-glucuronidase activity from that of other glycosidases. The enzyme itself matters biologically because it takes part in the metabolism of glucuronide conjugates of drugs and endogenous compounds. It is also used as a marker for certain bacteria and as the GUS reporter gene in plant engineering. Together, these features make the substrate a very useful measurement tool.

In Indonesia, the substrate is used by biotechnology laboratories, university research groups and institutions working on enzymology, microbiology and plant genetic engineering. Plant biotechnology teams use it to confirm GUS reporter gene expression in transformation studies. Microbiology laboratories use beta-glucuronidase activity as a marker for identifying certain bacteria. Pharmacology and biochemistry researchers use it to study how glucuronide conjugates are metabolised. Because the readout only needs standard spectrophotometric equipment, the substrate suits both teaching laboratories and advanced research facilities.

• Beta-glucuronidase activity assays: cleaving the substrate releases yellow 4-nitrophenol under alkaline conditions, so enzyme activity can be measured quantitatively by spectrophotometry without extra derivatization.
• GUS reporter gene analysis in plant biotechnology: the substrate detects beta-glucuronidase produced from the GUS reporter gene, which helps researchers confirm successful transformation and gene expression in engineered plants.
• Microbiological identification of certain bacteria: beta-glucuronidase activity serves as a marker for specific bacteria, and this chromogenic substrate gives a clear, measurable colour signal for that purpose.
• Pharmacological studies of drug metabolism: beta-glucuronidase takes part in breaking down glucuronide conjugates of drugs, so this substrate helps characterise enzyme activity relevant to drug metabolism research.
• Glycosidase specificity studies in biochemistry: the substrate is specific to the beta-glucuronide bond, so researchers can tell beta-glucuronidase activity apart from other glycosidases in complex biological samples.

Store 4-Nitrophenyl beta-D-Glucuronide in its original, tightly closed container, following the storage conditions on the TCI label and safety data sheet. As a general practice for biochemical substrates, keep it in a cool, dry place away from moisture, direct light and incompatible chemicals. Close the container right after use to prevent moisture uptake and contamination. Handle the material in a clean, well-ventilated area. Wear standard personal protective equipment, including laboratory gloves, safety glasses and a lab coat. Avoid creating dust, and do not let the substance touch skin or eyes. Prepare substrate solutions with clean glassware, and label all containers clearly. Read the safety data sheet before first use, and dispose of waste according to local laboratory and environmental regulations.

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