[Objective] The research on the isolation and purification of the antibacterial peptide in the surface mucus of catfish body and the analysis of its antibacterial activity was conducted.[Method] The antimicrobial peptide in the surface mucus of catfish body,which was high intensively raised,was preliminarily isolated and purified and its antibacterial activity was analyzed with the method of ammonium sulfate precipitation,Sephadex G-50 gel chromatography.[Results] Two elution peaks /absorption bands of the ...