Proteinase K is widely used in molecular biology for its ability to digest proteins and remove contaminants from nucleic acid preparations. It is particularly valuable in DNA and RNA extraction processes, where it helps to degrade nucleases that could otherwise degrade the target nucleic acids. This ensures the integrity and purity of the genetic material for downstream applications such as PCR, sequencing, and cloning. Additionally, it is employed in tissue dissociation protocols to break down cellular structures, facilitating the isolation of specific cell types or components. It also plays a key role in forensic science for extracting DNA from complex or degraded samples. Its robust activity across a range of conditions, including in the presence of detergents and denaturing agents, makes it a versatile tool in laboratory research.