- Structure of the gene for porcine peptide antibiotic PR-39, a cathelin gene family member: comparative mapping of the locus for the human peptide antibiotic FALL-39. Gudmundsson, G.H., Magnusson, K.P., Chowdhary, B.P., Johansson, M., Andersson, L., Boman, H.G. Proc. Natl. Acad. Sci. U.S.A. (1995)