Cell Penetrating Peptides

Cell-penetrating peptides in this set are delivery motifs such as TAT and poly-arginine used to study intracellular transport. They are research reagents, not transfection kits with a guaranteed payload. Cargo conjugation, fluorophore placement and serum stability are custom design questions. Confirm the exact residue string against the literature clone you already use. TAT, penetratin and R8 are typical names; small substitutions change both uptake and toxicity. A fluorescent CPP is a different molecule from the unlabeled parent and should be ordered as a labeled custom peptide if it is not listed. These sequences can be cytotoxic at high concentration; that is a property of many cationic peptides, not a quality defect. Related modification pages describe biotin and dye placement when the cargo is a second peptide. Catalog items remain lyophilized research solids. They are not supplied for human gene-delivery or therapeutic use.

If the analogue you need is not listed, request custom peptide synthesis with the exact sequence and purity.