Polypeptide and method for producing ornithine-based product using the same

A polypeptide having putrescine or arginine export activity and comprising an amino acid sequence that has at least 90% sequence identity to the amino acid sequence of SEQ ID NO:

• 1 or SEQ ID NO:
• 2, and wherein the alanine at the position corresponding to residue 152 of SEQ ID NO:
• 1 or SEQ ID NO:
• 2 is substituted with a different amino acid in the amino acid sequence of the polypeptide.