Streptavidin gold can be used to study biochemicals and reagents, fluorescent conjugates, fluorescent probes, labels, particles and stains, and streptavidin and avidin conjugates. Streptavidin gold has been used in a study to develop a simple, rapid, and sensitive method for visual detection of sequence-specific DNA. Streptavidin gold has also been used in a study to report the first instance of a novel application of mid-infrared chemical imaging (IRCI) for the fluorophore-free detection and identification of mycoplasma species.For detection of biotinylated compounds.