State of Oregon

George H Weber

James W Ayres

William E Sandine

A peptide, produced by propionibacteria, has a molecular weight of between 300 and 1200 daltons and is inhibitory to gram-negative bacteria. The peptide can be produced by purification of a propionibacteria metabolite mixture, by chemical synthesis, or by a host transformed with a recombinant vector, and is useful in preventing and treating bacterial infections.

Propionibacteria peptide microcin

A metabolite material of propionibacteria is added to a food product to inhibit the growth of yeast. The metabolite material is produced by growing propionibacteria cells in a liquid growth medium to produce a mixture containing the metabolite material. The mixture can be concentrated and added to a food product as a concentrated liquid or powder. The metabolite material added to a food product may contain viable cells of propionibacteria.

Propionibacteria metabolites inhibit spoilage yeast in foods

A metabolite material of propionibacteria, having a metabolite of molecular weight greater than 300, is added to a food product to inhibit the growth of gram negative psychotropic bacteria, yeast, mold, gram positive bacteria, or Listeria. The metabolite material may contain less than 0.02% propionic acid such that there is insufficient propionic acid per se to inhibit microbial growth. The metabolite material is produced by growing propionibacteria cells in a liquid growth medium to produce a mixture containing the metabolite material. The mixture can be concentrated and added to a food product as a concentrated liquid or powder. The metabolite material added to a food product may contain viable cells of propionibacteria.

Growing community of inventors

Beaverton, OR, United States of America

George H Weber