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Properties of selected gold cluster labels
| Gold cluster | Bioconjugate reactive group(s) of cluster | Labeled biomolecule moiety | Nominal diameter |
|---|---|---|---|
| Undecagold | Monoamino-, maleimido, Sulfo-NHS−, | –SH, –NH2 | 0.8 nm |
| Nanogold | Amino-, maleimido, Sulfo-NHS, | –SH, –NH2 | 1.4 nm |
| Ni-NTA–Nanogold | Ni(II) nitrilotriacetic acid (NTA) | Polyhistidine, particularly His6 | 1.8, 5 nm |
| MPCs: Au25, Au38, Au68, Au102, Au144 | Au | –SH | 0.9, 1.1, 1.3, 1.5, 2.0 nm |
