1. Source of the enzyme: extracted and purified from bovine pancreas; it is an endonuclease-type ribonuclease.

2. Core function: Specifically cleaves the phosphodiester bonds of RNA, efficiently degrading contaminating RNA in DNA samples.

3. Extended applications: It can also be used in various molecular experiments, such as RNase protection assays and the identification of mismatch sites in hybridization products.

1. Standard storage conditions: Store at −20°C, sealed and protected from light, to maintain stable enzyme activity over the long term.

2. Aliquoting recommendations: It is recommended to aliquot into single-use portions to minimize repeated freeze–thaw cycles, thereby preventing enzyme activity loss and reagent moisture absorption.

3. Room-Temperature Stability: When dissolved in the optimized storage buffer, the enzyme can be stored at room temperature for one month without any loss of activity.

This product has a wide range of applications, covering various types of experiments such as nucleic acid purification, structural analysis, and mutation detection.

1. During plasmid DNA extraction and purification, degraded RNA is removed to enhance the purity of the DNA sample.

2. Remove unhybridized RNA regions from DNA–RNA hybrids to identify the locations of single‑base mutations in either RNA or DNA.

3. Used in RNase protection assays to detect specific RNA sequences and their expression levels;

4. Broadly degrades RNA molecules in various DNA preparations, eliminating RNA‑induced interference in downstream assays.

1. Site of action: Specifically catalyzes the hydrolytic cleavage of the 3′–5′ phosphodiester bonds in the ribose moiety of RNA.

2. Reaction products: After cleavage, oligonucleotide fragments bearing a 2',3'-cyclic phosphate derivative are formed.

3. Key characteristics: Does not require cofactors, can directly exert nuclease activity, and exhibits broad reaction tolerances.

Using the internationally accepted Kunitz unit of enzyme activity, enzyme activity is accurately standardized, and experimental reproducibility is excellent.

1. Assay conditions: Activity was determined under standard reaction conditions at 25°C and pH 5.0.

2. Unit definition: Within 1 minute, the decrease in substrate absorbance from A₀ to Ap corresponds to one unit of activity.

3. Interpretation of terms: A₀ to Aₚ represent the total substrate conversion, with Aₚ being the final absorbance at the reaction endpoint.

1. Common inhibitors: In the absence of cofactors and divalent cations, they can be inhibited by placental RNase inhibitor (RNasin) or the oxovanadium–ribonucleotide complex (VRC).

2. Termination method: To terminate the enzymatic reaction, add the appropriate inhibitor or remove the enzyme protein by purification on a nucleic acid purification column or via phenol–chloroform extraction.

3. Precautions: Inhibitors must be used at the recommended concentrations to avoid excessive amounts that could interfere with subsequent experiments.

RNases are highly prone to spreading via aerosols and consumables, leading to RNA sample degradation; therefore, strict compartmentalized workflows and protective measures are essential.

1. Spatial segregation: The RNase A–handling area shall be physically separated from areas used for RNA extraction, RNA storage, and other RNA‑sensitive experiments; the cross‑use of pipettes and consumables is strictly prohibited.

2. Dedicated consumables: Use dedicated pipette tips and centrifuge tubes when dispensing RNase A to prevent contamination of the entire reagent bottle.

3. Post‑operational procedures: At the conclusion of the experiment, promptly clean the workbench and equipment, seal reagent bottles, and dispose of waste in accordance with laboratory biosafety guidelines.

1. High stability: The enzyme exhibits a broad range of optimal reaction conditions, remains stable at −20°C for long-term storage without significant inactivation, and its storage solution has been specially optimized.

2. Controllable activity: A clear definition of Kunitz activity units is established, and each batch undergoes activity assay to ensure consistent performance.

3. Higher purity: After multiple purification steps, enzyme impurities are minimized, thereby preventing non-specific degradation.

4. Ease of Use: Ready to use right out of the box—no need to prepare or calibrate solutions yourself; only standard laboratory safety precautions are required.

1. Usage Restrictions: This product is intended solely for research and experimental use and must not be used for any human clinical purposes.

2. Personal Protective Equipment: Wear a lab coat and disposable gloves during handling to prevent direct contact of the reagent with skin and mucous membranes.

3. Emergency Response: If skin or mucous membranes are accidentally contacted, immediately rinse the affected area thoroughly with copious amounts of water.

4. Waste Disposal: After use, promptly cap reagent bottles; dispose of experimental waste liquids and consumables in accordance with laboratory biosafety guidelines.

1. Substrate specificity: RNase A is a ribonuclease that specifically cleaves the ribose–phosphate diester bonds of RNA, without degrading DNA molecules.

2. Downstream compatibility: After RNA has been removed, the DNA sample, once purified to eliminate residual enzyme proteins, can be directly used in downstream molecular biology assays such as restriction digestion, PCR, sequencing, and transfection.

3. Precautions: If downstream assays are sensitive to enzyme residues, RNase A must be thoroughly removed using a purification column or an extraction method.