The present invention provides a water-soluble luminescent quantum dot, a biomolecular conjugate thereof and a composition comprising such a quantum dot or conjugate. Additionally, the present invention provides a method of obtaining a luminescent quantum dot, a method of making a biomolecular conjugate...http://www.google.com/patents/US6468808?utm_source=gb-gplus-sharePatent US6468808 - Water-soluble luminescent quantum dots and biomolecular conjugates thereof and related compositions and method of use
