Modified polypeptide having an activity of ornithine-based product exporter and method for producing ornithine-based product using cells expressing the polypeptide

A polypeptide comprising the amino acid sequence of SEQ ID NO:

• 3, SEQ ID NO:4, SEQ ID NO:
• 5, or SEQ ID NO:
• 6, and has export activity of at least one ornithine-based product selected from the group consisting of putrescine, arginine, ornithine, citrulline and proline.