Tetramethylrhodamine-5-maleimide (CAS 174568-67-3)

Tetramethylrhodamine-5-maleimide is a chemical compound widely used in biological and biochemical research due to its fluorescent properties and reactivity with thiol groups. It belongs to the rhodamine family of dyes and serves as a versatile tool for labeling and detection purposes. The primary characteristic of Tetramethylrhodamine-5-maleimide is its strong fluorescence emission in the red-orange spectrum, making it easily detectable and distinguishable in various experimental applications. It is employed in fluorescence microscopy, flow cytometry, and other imaging techniques to visualize and track specific molecules or structures of interest. Tetramethylrhodamine-5-maleimide is especially valued for its ability to react with thiol groups, which are present in cysteine residues of proteins or peptides. Through a thiol-maleimide reaction, the compound covalently attaches to thiol-containing biomolecules, forming a stable linkage. This property enables the specific labeling of proteins, peptides, and other molecules that possess thiol groups, facilitating their detection and analysis. Furthermore, Tetramethylrhodamine-5-maleimide exhibits good photostability, enabling prolonged observation without significant fading or photobleaching. Its fluorescence properties remain relatively unchanged even under continuous illumination, allowing for reliable and consistent imaging results. In summary, Tetramethylrhodamine-5-maleimide is a valuable fluorescent compound widely used in biological and biochemical research. Its intense red-orange fluorescence and reactivity with thiol groups make it a versatile tool for labeling and visualization of specific biomolecules, facilitating various applications in cellular and molecular studies.