Live Mouse Labeling
Multiplex imaging capability of QD in live animals: 106 mouse embryonic stem cells labeled with QD 525, 565, 605, 655, 705, and 800 and the image recorded with a single excitation light source right after injection.

"Quantum dot imaging for embryonic stem cells,"
BMC Biotechnology 2007, 7:67
Long-term experiments demonstrated that these quantum dots remain fluorescent after at least four months in vivo.

"Noninvasive Imaging of Quantum Dots in Mice,"
Bioconjugate Chem. 15, 79-86 (2004)
“Following the (nano)dots,” Byron Spice, Pittsburgh Post-Gazette,
http://www.post-gazette.com/pg/04033/268249.stm