Fusion protein or conjugated protein, intracellular delivery carrier, partial peptide, cell membrane permeation enhancer, DNA, and vector

A fusion protein or conjugated protein comprising a partial peptide consisting of an amino acid sequence encoded by DNA set forth in any of (a) to (d), and

• a ligand directly attached to the partial peptide, the ligand having a binding capability to a receptor on a cell surface,
• wherein the partial peptide has cell membrane permeability and endosomal escape ability,
• (a) DNA consisting of a base sequence encoding an amino acid sequence set forth in SEQ ID NO:
• 1, 2, or 3,
• (b) DNA consisting of a base sequence capable of hybridizing under stringent conditions with a base sequence complementary to a base sequence encoding an amino acid sequence set forth in SEQ ID NO:
• 1, 2, or 3,
• (c) DNA consisting of a base sequence encoding an amino acid sequence where three or fewer amino acids are substituted, three or fewer amino acids are deleted, or three or fewer amino acids are added to an amino acid sequence set forth in SEQ ID NO:
• 3, and
• (d) DNA consisting of a base sequence encoding an amino acid sequence consisting of 90% or more identity with an amino acid sequence set forth in SEQ ID NO:
• 1, 2, or 3.