▎ 摘　　要

NOVELTY - Polypeptide, is new. The 1, 24 and 27 positions of the polypeptide are aromatic amino acids from the N end to the C end. USE - The polypeptide is useful for producing recombinant proteins of various microorganisms with excellent power generation functions by using Escherichia coli. ADVANTAGE - The polypeptide finds the sequence of the power generation material from microorganisms that do not produce power generation materials in nature. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) isolated polynucleotide, where the polynucleotide encodes the polypeptide; (2) construct, comprising polynucleotide; (3) expression system, comprising construct or exogenous polynucleotide integrated into the genome; and (4) battery, comprising polypeptide.