In this bioconjugate, the SWCNTs were functionalized with the protein annexin A5 (ANXA5), which binds with high affinity to the anionic phospholipid phosphatidylserine expressed externally on tumor cells and on endothelial cells of the tumor vasculature, but not on normal cells in the vasculature [12–14]. This evidence concerns the gene ANXA5 and neoplasm.