(microorganism used as biocatalyst for the reduction of carbonyl groups and double bonds,1 either under fermenting conditions, immobilized, or ultrasonically stimulated) Solubility: insol cold and warm H2O; used as a slurry. Form Supplied in: yellowish pressed cakes, commercially available as cubes from bakeries or supermarkets, usually produced by brewery companies. Handling, Storage, and Precautions: the wet cake must be stored in the refrigerator (0–4 °C) and used within the date indicated by the manufacturer.