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Why do proteins bind to gold colloids and is the attraction reversible?

April 26, 2017bind colloids gold Proteins reversible

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Why do proteins bind to gold colloids and is the attraction reversible?

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Protein binds to gold colloid for three main reasons: charge (lysine), hydrophobic attraction (tripophan), and sulphur bonding (cystine and methinine). Generally the attraction isn’t reversible, but long term storage at high pH or in a buffer containing surfactant may cause some protein to become unbound.