CD Bioparticles provides Functional Gold Nanoparticles with different active groups. The carboxyl and amine functional gold nanoparticles are suitable for covalent conjugation of antibodies, proteins, nucleic acids and other ligands by using standard EDC/NHS activation. We also provide NHS-activated gold nanoparticles in a convenient One-Step Conjugation Kit format. The kit enables fast and convenient one-step conjugation of your desired antibody to gold nanoparticles by simple mixing process.