Product nameAlexa Fluor® 488 Conjugation Kit (Fast) - Lightning-Link®
Alexa Fluor® 488 Conjugation Kit / Alexa Fluor® 488 Labeling Kit ab236553 uses a simple and quick process for Alexa Fluor 488 labeling / conjugation of antibodies. It can also be used to conjugate other proteins or peptides. Learn about our antibody labeling kits and their advantages.
To conjugate an antibody to Alexa Fluor® 488 using this kit:
- add modifier to antibody and incubate for 15 mins
- add quencher and incubate for 5 mins
The Alexa Fluor® 488 conjugated antibody can be used immediately in WB, ELISA, IHC etc. No further purification is required and 100% of the antibody is recovered for use.
Learn about buffer compatibility below; for incompatible buffers and low antibody concentrations, use our rapid antibody purification and concentration kits. Use the FAQ to learn more about the technology, or about conjugating other proteins and peptides to Alexa Fluor® 488.
This product is manufactured by Expedeon, an Abcam company, and was previously called Lightning-Link® Rapid Alexa Fluor® 488 Labeling Kit. 332-0015 is the same as the 1 mg size. 332-0010 is the same as the 3 x 100 ug size. 332-0030 is the same as the 3 x 10 ug size. 332-0005 is the same as the 100 µg size.
Amount and volume of antibody for conjugation to Alexa Fluor® 488
Kit size Recommended
amount of antibody1
amount of antibody
3 x 10 µg 3 x 10 µg 3 x 20 µg 3 x 10 µL 100 µg 100 µg 200 µg 100 µL 3 x 100 µg 3 x 100 µg 3 x 200 µg 3 x 100 µL 1 mg 1 x 1 mg 1 x 2 mg 1 x 1 mL
1 Using the maximum amount of antibody may result in less labelling per antibody.
2 Ideal antibody concentration is 1mg/ml. 0.5 - 1 mg/ml can be used if the maximum antibody volume is not exceeded. Antibodies > 5mg/ml or < 0.5 mg/ml should be diluted /concentrated.
Buffer Requirements for Conjugation
Buffer should be pH 6.5-8.5.
Compatible buffer constituents
If a concentration is shown, then the constituent should be no more than the concentration shown. If several constituents are close to the limit of acceptable concentration, then this can inhibit conjugation.
50mM / 0.6% Tris1 0.1% BSA2 50% glycerol 0.1% sodium azide PBS Potassium phosphate Sodium chloride HEPES Sucrose Sodium citrate EDTA Trehalose
1 Tris buffered saline is almost always ≤ 50 mM / 0.6%
2 BSA can also interfere with the use of the conjugated antibody in tissue staining.
Incompatible buffer constituents
Thiomerosal Proclin Glycine Arginine Glutathione DTT
Only purified antibodies are suitable for use, ie. where other proteins, peptides, or amino acids are not present: antibodies in ascites fluid, serum or hybridoma culture media are incompatible.
Alexa Fluor® is a registered trademark of Molecular Probes, Inc, a Thermo Fisher Scientific Company. The Alexa Fluor® dye included in this product is provided under an intellectual property license from Life Technologies Corporation. As this product contains the Alexa Fluor® dye, the purchase of this product conveys to the buyer the non-transferable right to use the purchased product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). As this product contains the Alexa Fluor® dye the sale of this product is expressly conditioned on the buyer not using the product or its components, or any materials made using the product or its components, in any activity to generate revenue, which may include, but is not limited to use of the product or its components: in manufacturing; (ii) to provide a service, information, or data in return for payment (iii) for therapeutic, diagnostic or prophylactic purposes; or (iv) for resale, regardless of whether they are sold for use in research. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, 5781 Van Allen Way, Carlsbad, CA 92008 USA or email@example.com.
Storage instructionsStore at -20°C. Please refer to protocols.
Components 100 µg 1 mg 3 x 10 µg 3 x 100 µg Alexa Fluor 488® mix (Lyophilized) 1 vial 1 vial 3 vials 3 vials Modifier reagent 1 vial 1 vial 1 vial 1 vial Quencher reagent 1 vial 1 vial 1 vial 1 vial
A polyclonal antibody was purchased from a commercial source and conjugated to Alexa Fluor® 488 using Alexa Fluor® 488 Conjugation Kit (Fast) - Lightning-Link® (ab236553) and to CF™488A dye using a competitor conjugation kit. The conjugates were tested by ELISA and the fluorescence measured at 523nm after excitation at 487nm. The Abcam conjugate out-performs the competitor.
ab236553 has been referenced in 2 publications.
- Wu XY et al. Complement C1q synergizes with PTX3 in promoting NLRP3 inflammasome over-activation and pyroptosis in rheumatoid arthritis. J Autoimmun 106:102336 (2020). PubMed: 31601476
- Kraman M et al. FS118, a Bispecific Antibody Targeting LAG-3 and PD-L1, Enhances T-Cell Activation Resulting in Potent Antitumor Activity. Clin Cancer Res N/A:N/A (2020). PubMed: 32299814