“…A CPP, p28, has been found to have an ability of cancer preferential entry [ 59 , 60 , 61 , 62 , 63 , 64 , 76 , 77 , 78 ]. p28 is an anionic peptide made up of 28 amino acid residues (LSTAADMQGWTDGMASGLDKDYLKPDD) [ 65 , 66 , 79 , 80 , 81 , 82 ]. Specifically, the residues between Leu 50 -Asp 77 within a protein known as azurin that are secreted by an opportunistic pathogen, Pseudomonas aeruginosa [ 67 , 68 , 83 ].…”