Intracellular introduction agent of target protein and intracellular introduction method of target protein

摘要

PROBLEM TO BE SOLVED: To provide an intracellular introduction agent of target protein which has low toxicity to a cell, has a high introduction efficiency of a target protein into a cell, and can readily release the target protein from a carrier (intracellular introduction agent) after the intracellular introduction of the target protein, to provide a nucleic acid encoding the intracellular introduction agent, and to provide an intracellular introduction method of the target protein using the intracellular introduction agent.SOLUTION: The invention provides an intracellular introduction agent of a target protein consisting of a polypeptide consisting of an amino acid sequence of a formula (1), or a variant thereof; a nucleic acid encoding the intracellular introduction agent; and an intracellular introduction method of the target protein using the intracellular introduction agent. Amino acid sequence: X-Y-Z...(1) (X, Y, and Z represent each independently a specific amino acid sequence, and n is integer of 1-8)