PH tolerance in Gram positive bacteria

Proton pumps: F1F0 -ATPases from tolerant bacteria are less sensitive to low pH, -Glutamate decarboxylases (GAD) : consume protons via glutamate decarboxylation; the reaction product γ γ-aminobutyrate (GABA) is exported from the cell. Protein repair/DNA repair. Regulators. Altered metabolism. Cell density. Envelope alterations. Production of alkali :