TFRC and cancer: Amongst their many applications in biology and medicine, antibodies have also been used to target nanoparticles to specific cell receptors expressed on cancer cells, such as the transferrin receptor (TfR),230, 231, 232 EGFR,197, 233, 234, 235 HER2,228 EphA2,229 CD44,225, 252 nucleosome‐restricted,226 MHC‐restricted antigens,227 for chemoimmunotherapy.