Abstract: Provided are a method for regulating acid resistance of a microorganism by suppressing the expression of the fadD gene therein and a screening method for a microorganism having acid resistance by using the expression level of the fadD gene as an index. A method for regulating acid resistance of a microorganism, including suppressing the expression of fadD gene present in the microorganism.

Abstract: Disclosed is a novel lactic acid bacterium belonging to Lactobacillus plantarum, which has an excellent fermentative ability affording high achievable cell counts even if various vegetable or fruit juices are used as fermentative substrates. The lactic acid bacterium belonging to Lactobacillus plantarum is characterized by the achievable viable cell counts being 108 CFU/ml or more in both cases when 100% juice of grape or of orange is used as fermentative substrate.

Abstract: Provided are a method for regulating acid resistance of a microorganism by suppressing the expression of the fadD gene therein and a screening method for a microorganism having acid resistance by using the expression level of the fadD gene as an index. A method for regulating acid resistance of a microorganism, including suppressing the expression of fadD gene present in the microorganism.

Abstract: Provided is a gene that is useful for imparting hydrogen peroxide resistance to a microorganism. Also provided is a method for using the same. The hydrogen peroxide resistance-imparting gene encoding a protein selected from the following proteins (a) to (c): (a) a protein having the amino acid sequence of SEQ ID NO: 2; (b) a protein which has an amino acid sequence equivalent to the amino acid sequence of (a), except that one to several amino acid residues are deleted, substituted, or added, and which exhibits hydrogen peroxide resistance-imparting activity; and (c) a protein which has an amino acid sequence having an identity of 85% or higher to the amino acid sequence of (a), and which exhibits hydrogen peroxide resistance-imparting activity.

Abstract: Provided is a gene that is useful for imparting hydrogen peroxide resistance to a microorganism. Also provided is a method for using the same. The hydrogen peroxide resistance-imparting gene encoding a protein selected from the following proteins (a) to (c): (a) a protein having the amino acid sequence of SEQ ID NO: 2; (b) a protein which has an amino acid sequence equivalent to the amino acid sequence of (a), except that one to several amino acid residues are deleted, substituted, or added, and which exhibits hydrogen peroxide resistance-imparting activity; and (c) a protein which has an amino acid sequence having an identity of 85% or higher to the amino acid sequence of (a), and which exhibits hydrogen peroxide resistance-imparting activity.

Abstract: Disclosed is a novel lactic acid bacterium belonging to Lactobacillus plantarum, which has an excellent fermentative ability affording high achievable cell counts even if various vegetable or fruit juices are used as fermentative substrates. The lactic acid bacterium belonging to Lactobacillus plantarum is characterized by the achievable viable cell counts being 108 CFU/ml or more in both cases when 100% juice of grape or of orange is used as fermentative substrate.

Abstract: To provide a bacterium belonging to the genus Bifidobacterium which is excellent in a survival ability in the gastrointestinal tract, has an effect of inhibiting the cholesterol absorption in the intestinal tract, and is excellent in lipid metabolism ameliorating effects including decreasing the blood cholesterol level and the like, and shows a high survival rate after storage, and a cholesterol absorption inhibitor using the same. The invention provides a cholesterol absorption inhibitor containing, as an active ingredient, at least one microorganism selected from Bifidobacterium animalis subsp. animalis YIT 10394, Bifidobacterium animalis subsp. lactis JCM 1253, Bifidobacterium animalis subsp. lactis JCM 7117, and Bifidobacterium pseudolongum subsp. globosum.

Abstract: To provide a bacterium belonging to the genus Bifidobacterium which is excellent in a survival ability in the gastrointestinal tract, has an effect of inhibiting the cholesterol absorption in the intestinal tract, and is excellent in lipid metabolism ameliorating effects including decreasing the blood cholesterol level and the like, and shows a high survival rate after storage, and a cholesterol absorption inhibitor using the same. The invention provides a cholesterol absorption inhibitor containing, as an active ingredient, at least one microorganism selected from Bifidobacterium animalis subsp. animalis YIT 10394, Bifidobacterium animalis subsp. lactis JCM 1253, Bifidobacterium animalis subsp. lactis JCM 7117, and Bifidobacterium pseudolongum subsp. globosum.