Fig. 3From: Targeted drug delivery of near IR fluorescent doxorubicin-conjugated poly(ethylene glycol) bisphosphonate nanoparticles for diagnosis and therapy of primary and metastatic bone cancer in a mouse modelIntracellular fluorescence of Soas-2 cells treated with free doxorubicin (a) and doxorubicin-conjugated BP NPs (b) as a function of drug concentration. Graph comparing positive cell uptake of free and conjugated doxorubicin as a function of drug concentration(c)Back to article page