Comparison of the staining efficiency of Annexin V-functionalized Qdots (staining achieved in one step using 2 nM of Qdots and 4 nM of biotinylated Annexin V, red), FITC-Annexin V (0.5% v/v, green) and Alexa Fluor 647-Annexin V (0.5% v/v, pink). (a) Light microscope pictures and pictures taken at s. (b) Intensity variation as a function of time for the three staining agents conjugated to Annexin V, FITC, Alexa Fluor 647 and Qdots. Intensity values expressed as relative values , where is the intensity measured at the first irradiation of the sample (with permission from [70]).
