LTF and cancer: With the exception of the foregoing proteins, several other proteins, e.g., silk fibroin (Bian et al., 2016; Khalid et al., 2016; Liu et al., 2016), zein (Wang et al., 2017b), lipoprotein (Mathew et al., 2013; Alberti et al., 2015) and lactoferrin (Kamalapuram et al., 2016; Kanwar et al., 2016), have also been successfully employed for cancer theranostics, as detailed in Table 1.