The present invention provides a method of preparing a multicolor quantum dot-tagged bead, a multicolor quantum dot-tagged bead, a conjugate thereof, and a composition comprising such a bead or conjugate. Additionally, the present invention provides a method of making a conjugate thereof and methods...http://www.google.com/patents/US20030148544?utm_source=gb-gplus-sharePatent US20030148544 - Methods of preparing multicolor quantum dot tagged beads and conjugates thereof