Ee-CBP, a hevein-type antimicrobial peptide was isolated from the bark of the spindle tree (Euonymus europaeus L.). This 4992.5 Da protein exhibited a very strong antifungal activity against five different fytopathogenic fungi that were tested. Concentrations required to inhibit the growth of Botrytis cinerea in agar diffusion assays and microtiterplate assays were 5 micrograms/ml and 1 microgram/ml, respectively. Comparative tests further indicated that Ee-CBP is a more potent antifungal protein than Ac-AMP2, an antimicrobial peptide from seeds of Amaranthus caudatus L. when tested with the same fungus.