Proteinase K solution is widely used in molecular biology for its ability to digest proteins and remove contaminants from nucleic acid preparations. It is particularly effective in breaking down cellular proteins during DNA and RNA extraction, ensuring the isolation of pure genetic material. This enzyme is also employed in the preparation of samples for PCR, Southern blotting, and other techniques where protein removal is critical. Additionally, Proteinase K is utilized in histology to unmask antigens by digesting proteins that may obscure antibody binding sites, enhancing the accuracy of immunohistochemical staining. Its stability and broad substrate specificity make it a valuable tool in various research and diagnostic applications.