TAT 2-4, a peptide derived from the HIV-1 transactivator of transcription (Tat) protein, is a small basic peptide proven effective in delivering a wide range of cargoes, including small particles, proteins, and peptides.
This peptide is a scrambled sequence of NADPH oxidase assembly peptide inhibitor gp91 ds-tat. It is used as a control peptide. It is two amino acid residues shorter at the N-terminus compared to the scrambled gp91 ds-tat.