Nanoparticle Diameter: 15 nm Fluorescent Dye Label: None Volume (@ 10 OD): 1 mL Gold nanoparticles functionalized with Protein L. Protien L binds all classes of IgG containing kappa light chains These nanoparticles can be fluorescently labeled with an optional fluorescent dye tag Core Diameter: 4 nm – 200 nm Absorbance peak: 520 – 850 nm 5 kDa PEG spacer, 2 kDa PEG backfill Shelf life: > 4 months (4°C storage) Supplied as liquid suspension in PBS