The present invention provides antimicrobial peptides. The peptides are
non-glycosylated, less than about 100 amino acids in length, and include
an amino acid sequence selected from: AVESTVATLEA.SIGMA.PEVIESPPE (SEQ ID
NO:3), AVESTVATLED.SIGMA.PEVIESPPE (SEQ ID NO:4), AVESTVATLEASPEVIESPPE
(SEQ ID NO:5), AVESTVATLEDSPEVIESPPE (SEQ ID NO:6), DMPIQAFLLYQQPVLGPVR
(SEQ ID NO:7), and conservative substitutions therein. These peptides can
be produced synthetically; however, they can most conveniently be derived
from casein.