Related Experiment Video
Updated: Aug 15, 2026

Engineering Adherent Bacteria by Creating a Single Synthetic Curli Operon
Published on: November 16, 2012
The effect of some divalent cations on extracellular polysaccharide synthesis in Streptococcus salivarius
Abstract:
The amount of extracellular insoluble polysaccharide produced by Streptococcus salivarius can be effected by some divalent cations. Calcium at concentrations of 1 X 10(-3) and 10(-4) M caused a reduction in polysaccharide synthesis. Magnesium at 1 X 10(-3) M inhibited extracellular polysaccharide production but at 1 X 10(-4) M had little effect. Manganese was without effect on polysaccharide synthesis. Zinc at 1 X 10(-3) and 1 X 10(-4) M caused a substantial increase in extracellular polysaccharide synthesis.
More Related Videos
11:17Monitoring Changes in Membrane Polarity, Membrane Integrity, and Intracellular Ion Concentrations in Streptococcus pneumoniae Using Fluorescent Dyes
Published on: February 17, 2014
09:20Investigating the Effects of Probiotics on Pneumococcal Colonization Using an In Vitro Adherence Assay
Published on: April 28, 2014
Related Concept Videos
Cellulose and Pectic Polysaccharides
As a cell matures, its cell wall specializes according to its type. For example, the parenchyma cells of...
Ionic Strength: Effects on Chemical Equilibria
In this solution, the primary cation—the calcium...
Stringent Response in E. coli
Determinants of Bacterial Pathogenicity and Virulence