Biochemical staining is a laboratory technique used to enhance the visibility of specific biological structures or components in cells and tissues. This process involves applying dyes or chemical agents that bind to particular molecules, allowing researchers to observe and analyze cellular components under a microscope. Common applications include identifying proteins, nucleic acids, and other biomolecules. Different types of stains are used depending on the target structure. For example, Gram staining is used to differentiate bacterial species, while Hematoxylin and Eosin (H&E) staining is commonly employed in histology to visualize tissue architecture. These techniques are essential for diagnostics and research in fields like pathology and cell biology.