Enzymes; Laboratory Services; Yeast Cultures & Nutrients; White Labs Offers Pure, Cultured Liquid Wine Yeast and Malolactic Cultures for Enthusiasts and Professional Winemakers. White Labs Yeast Cultures Require No Rehydration and are Ready to Inoculate. Yeast Cultures are Packaged in the Same Vessel it was Grown In, Ensuring a High Cell Count; the Native Yeast Isolation and Banking Program Offers Tailored Solutions to Those Interested in Obtaining a Proprietary Estate Culture. White Labs Works, Wine Accessories, Barrels ...