Overview
Ribonuclease A (RNase A) is an enzyme that specifically degrades RNA by cleaving the phosphodiester bonds. It is derived from bovine pancreas and is commonly used in molecular biology to remove RNA from DNA samples. RNase A is highly stable and retains activity under a wide range of conditions, making it a versatile tool in laboratory settings. Its specificity for single-stranded RNA allows for precise applications without affecting DNA integrity.
Physical and Chemical Properties
RNase A is a small, globular protein with a molecular weight of approximately 13.7 kDa. It is typically supplied as a lyophilized powder, which can be reconstituted in water or buffer solutions. The enzyme exhibits optimal activity at a slightly acidic to neutral pH (around 7-8) and is resistant to denaturation by heat or organic solvents. This stability is crucial for its use in various experimental conditions.
Main Applications
RNase A is primarily used in molecular biology to eliminate RNA contamination from DNA samples. This is essential for applications such as PCR, cloning, and sequencing, where RNA can interfere with results. Additionally, RNase A is employed in RNA mapping studies and as a control in experiments involving RNA degradation. Its specificity and efficiency make it indispensable in research and diagnostic laboratories.
Safety and Storage
RNase A should be handled with care to avoid inhalation or skin contact. Personal protective equipment, such as gloves and lab coats, is recommended. For long-term storage, the enzyme should be kept at -20°C in a dry environment. Reconstituted solutions can be stored at 4°C for short-term use, but repeated freeze-thaw cycles should be avoided to maintain activity.
B2B Procurement Guide
When procuring RNase A, it is important to verify the purity and activity specifications provided by the supplier. High-purity grades (e.g., DNase-free) are recommended for sensitive applications. Bulk purchases may offer cost savings, but storage conditions must be carefully managed to prevent degradation. Suppliers should be evaluated based on consistency, reliability, and compliance with industry standards.
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