Nanoparticle Diameter: 4 nm Fluorescent Dye Label: AFDye 555 Volume (@ 10 OD): 1 mL Gold nanoparticles functionalized with Protein A. Protien A binds human IgG, IgM, IgA, IgE Protien A binds IgG from monkey, rabbit, pig, guinea pig, dog, and cat 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