Extremely uniform 1.4 nm gold particle. Label at specific sites which do not obstruct native reactivity. Close to stoichiometric labeling. Reacts under mild, neutral conditions. Conjugates are easily isolated by gel filtration.
Conjugates are stable to a wide range of pH and ionic strengths.
You can use our unique gold labeling reagents just as you would use fluorescent labeling reagents. Prepare the smallest gold immunoprobe with your own primary antibody for unsurpassed resolution, penetration and localization, or label a variety of other biological molecules. Label other proteins directly for high resolution site specific identification. Reaction is complete in a few hours, and the labeled conjugate is purified chromatographically by gel filtration. Label proteins which do not contain a cysteine.