Disclosed herein are methods of treating cancer in a patient the method comprising identifying a patient who is resistant to treatment with an anti HER2 therapy and administering to the patient a drug delivery molecule comprising a polypeptide molecule adapted to target and/or penetrate a type of cell a nucleic acid molecule bound to the polypeptide sequence via electrostatic interactions and a chemical agent non covalently linked to the nucleic acid sequence. Also disclosed are methods of inducing apoptosis in an anti HER2 therapy resistant HER2+ breast cancer cell the method comprising contacting the anti HER2 therapy resistant HER2+ breast cancer cell with the drug delivery molecule. Further disclosed herein are methods of treating cancer in a patient the method comprising identifying a patient who is resistant to anti HER2 therapy and administering to the patient a therapeutically effective amount of a drug delivery molecule comprising a polypeptide molecule adapted to target and/or penetrate a type of cell and a sulfonated corrole molecule bound to the polypeptide sequence. Finally disclosed herein are methods of inducing apoptosis in an anti HER2 therapy resistant HER2+ breast cancer cell the method comprising contacting the anti HER2 therapy resistant HER2+ breast cancer cell with a drug delivery molecule comprising a polypeptide molecule adapted to target and/or penetrate a type of cell and a sulfonated corrole molecule bound to the polypeptide sequence