Related Experiment Video
Updated: Jun 19, 2026
04:41
Measuring Lactase Enzymatic Activity in the Teaching Lab
Published on: August 6, 2018
STUDIES ON BACTERIAL ENZYMES : III. PNEUMOCOCCUS MALTASE AND LACTASE
1Department of Bacteriology and Immunology of Vanderbilt University Medical School, Nashville.
The Journal of Experimental Medicine
|October 30, 2009
Summary
Pneumococcus bacteria contain the enzymes lactase and maltase. These enzymes are integral components of the pneumococcus cell structure and function.
Area of Science:
- Microbiology
- Enzymology
Background:
- * Streptococcus pneumoniae (pneumococcus) is a significant human pathogen.
- * Understanding bacterial cell composition is crucial for developing targeted therapies.
Purpose of the Study:
- * To investigate the enzymatic constituents of the pneumococcus cell.
- * To identify the presence and role of specific carbohydrate-hydrolyzing enzymes.
Main Methods:
- * Biochemical assays were employed to detect enzyme activity.
- * Cellular fractionation and analysis were performed on pneumococcus isolates.
Main Results:
- * The study confirmed the presence of both lactase and maltase within the pneumococcus cell.
- * These enzymes were identified as integral components of the bacterial cell.
Conclusions:
- * Lactase and maltase are intrinsic components of the pneumococcus cellular makeup.
- * This finding contributes to the understanding of pneumococcal metabolism and cell biology.
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
07:47Anti-virulent Disruption of Pathogenic Biofilms using Engineered Quorum-quenching Lactonases
Published on: January 1, 2016
Related Concept Videos
01:29Microbes in Food Production
Microbial fermentation is central to food biotechnology, enhancing flavor, texture, preservation, and stability. Fermentative microorganisms metabolize carbohydrates into organic acids, alcohols, and other metabolites that inhibit spoilage organisms and improve digestibility while contributing distinctive sensory qualities.In baking, amylases naturally present in flour hydrolyze starch into monosaccharides such as glucose, which Saccharomyces cerevisiae ferments anaerobically. Through...
01:27Production of Alcohol
Continuous fermentation is a key strategy in industrial ethanol production, particularly when efficiency, scalability, and high yields are essential. This approach allows for uninterrupted operation and optimized resource utilization. The primary feedstock, corn starch, undergoes enzymatic hydrolysis facilitated by α-amylase and glucoamylase. These enzymes break down the starch into fermentable sugars such as glucose, which are readily assimilated by fermentative microorganisms.Fermentation...
01:13Special Staining Techniques
Specialized staining techniques play a vital role in microbiology by enabling the visualization of specific bacterial structures that remain undetectable with standard microscopy methods. These techniques not only enhance the structural visualization of bacterial cells but also provide critical insights into their pathogenicity and classification. Additionally, they support diagnostic and research endeavors in microbiology by identifying key bacterial features.Capsule Staining for Virulence...
01:25Production of Organic Acids
Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...
01:25Microbes in Beverage Production
Alcoholic beverages such as wine, beer, and spirits are the products of microbial fermentation processes that transform simple sugars into ethanol and a wide array of complex flavor compounds. These transformations rely on the metabolic activities of specific yeasts and bacteria, which are selected and controlled to yield the desired beverage characteristics.Wine Fermentation and MaturationWine production begins with the crushing of grapes to release juice and pulp, forming a must that is...
01:23Microbial Fermentation
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...