The authors concluded that Lb. delbrueckii subsp. bulgaricus NCFB 2772 produces two HePS fractions with relative molecular masses of 1.7106 and 4.0104. Later, they reported on a different monomer composition, and found that the production of the high-molecular-mass fractions (galactose,glucose, and rhamnose in the molar ratio of 5.0 : 1.0 : 1.0) appears to be dependent on the carbohydrate source (glucose versus fructose), whereas the lowmolecular- mass fractions (galactose, glucose, rhamnose in the molar ratio of approximately 11.0 : 1.0 : 0.4) are produced more continuously (Grobben et al., 1997).