Various reagents designed to selectively label target proteins. Products include classic dyes, radioisotope labels, biotinylation reagents, fluorescent labels, molecular probes, assays, and labeling kits.
Biotinylate glycoproteins (aldehydes of oxidized sugars) with a mid-length (27.0A), pegylated biotinylation reagent containing a 4-unit PEG spacer for length and solubility.
Biotin-4-fluorescein can be used to quantitate available biotin-binding sites or the concentration of avidin or streptavidin through the strong quenching associated when this molecule binds to avidin.