Chromeo™ 505 Goat anti-Rabbit IgG

Catalog No: 15040 Format: 1 mg $185 Buy
Catalog No: 15060 Format: 100 µg $105 Buy
Absorption:514 nm
Emission:530 nm
Molar Extinction:70,000 M-1 cm-1
Quantum Yield:~30%
Antibody Type:Polyclonal
Purification:Affinity Purified

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Contents: 1 mg (Catalog No. 15040) or 0.1 mg (Catalog No. 15060) of Chromeo™ 505 conjugated Goat anti-Rabbit IgG (H+L). The antibody concentration is 2 mg/ml in 0.01 M potassium phosphate, 0.15 M sodium chloride pH 7.4, containing 2 mM sodium azide.

Specificity: This antibody was purified by immunoaffinity chromatography. It reacts with whole molecular rabbit IgG and the light chains of other rabbit immunoglobulins. No cross-reactivity with non-immunoglobulin serum proteins was observed.

Chromeo 505 can be excited in a range from 480-515 nm, which enables excitation by a green laser. Even if the emission spectrum is shifted towards longer wavelength by some nm, filters designed for fluorescein can be used with Chromeo 505 conjugated antibodies. In contrast to fluorescein, Chromeo 505 exhibits a large tolerance to a broad pH range and high photostability. Chromeo 505 conjugated antibodies have absorption and emission maxima of approximately 514 and 530 nm, which are compatible with common excitation sources and filter sets.

Application Notes

Immunofluorescence: 1:1,000 to 1:2,000 dilution
Plate-based assays: 1:800 to 1:1,000 dilution

Chromeo 505 Goat anti-Rabbit IgG is recommended by Leica Microsystems for Super-Resolution Fluorescence Microscopy using Leica's STimulated Emission Depletion (STED) microscopes. It has also been tested and verified by Leica for use in Ground State Depletion with Individual Molecule return (GSDIM) using the SR GSD microscope. STED enables resolution of 50-70 nm, while GSDIM can mathematically re-construct images with resolution as low as 20 nm.

Absorption and emission spectra of Chromeo 505 Dye.

Absorption and emission spectra of Chromeo 505 Dye.

Active Motif's primary antibodies and fluorescent secondary antibodies in STED microscopy.

Active Motif's primary antibodies and fluorescent secondary antibodies in STED microscopy.
HeLa cells were stained with alpha Tubulin mouse monoclonal antibody (Clone 5-B-1-2, Cat. No. 39527), a biotinylated secondary goat anti-mouse antibody and BD Horizon V500-streptavidin conjugate. Histone H3 was stained with Histone H3 trimethyl Lys4 rabbit polyclonal antibody (Catalog No. 39159) and Chromeo 505 Goat anti-Rabbit IgG secondary antibody. The STED (STimulated Emission Depletion) image is courtesy of Leica Microsystems, Germany.


Some products may be shipped at room temperature. This will not affect their stability or performance. Upon receipt, unconjugated antibodies may be stored at -20°C for up to 2 years. Fluorophore- & enzyme-conjugated antibodies should be stored at 4°C. Fluorophore-conjugated antibodies should be protected from light. Keep reagents on ice when not in storage; to avoid repeated freeze/thaw cycles, we recommend aliquoting items that will be stored frozen into single-use fractions prior to freezing.


This product is guaranteed for 6 months from date of receipt.

This product is for research use only and is not for use in diagnostic procedures.