Streptavidin-Texas red X

Streptavidin is a 52,800 dalton tetrameric protein that binds to Biotin with high specificity, and one molecule Streptavidin can bind to 4 Biotin molecules, and this binding is irreversible. Compared with avidin, the affinity of Streptavidin and Avidin, which is derived from egg white, is highly similar to that of Biotin, but Streptividin is almost uncharged under neutral conditions, so the non-specific binding of Streptavidin is much lower than that of Avidin, and the non-specific background of the detection is much less. Streptavidin can be used for the detection of Biotin-labeled antibodies, nucleic acids, proteins, or other biotinylated molecules.

Texas Red X is a fluorescent dye that is a fluorescein (xanthene) derivative that is commonly used in techniques such as fluorescence microscopy and flow cytometry due to its high brightness and stability. It emits red fluorescence with an excitation wavelength of about 595 nm and an emission wavelength of about 615 nm.

Streptavidin-Texas Red X is a bioprobe that combines Streptavidin protein and Texas Red fluorescent dye, making it a powerful and sensitive fluorescent labeling tool.