EGFR and central nervous system cancer: Feng et al. [157] used the immunoliposomes to deliver sodium borocaptate (BSH) encapsulated in liposomes composed of nickel lipid (a lipid derivatized with a nickel-chelating head group) and antiepidermal growth factor receptor (EGFR); antibodies were conjugated to the liposomes using the antibody affinity motif of protein A (ZZ) as an adaptor into EGFR-overexpressing glioma cells.