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Lactose: the milk sugar from a biotechnological perspective
Ana C Adam1, Marta Rubio-Texeira, Julio Polaina
1Instituto de Agroquímica y Tecnología de Alimentos, Valencia, Spain.
Critical Reviews in Food Science and Nutrition
|June 23, 2005
Summary
Lactose, a key sugar in milk, is vital for nutrition and fermentation. Its study offers insights into biochemical pathways and has industrial applications in dairy and pharmaceuticals.
Area of Science:
- Biochemistry
- Food Science
- Industrial Microbiology
Background:
- Lactose is a crucial sugar abundant in mammalian milk, serving as a primary nutrient.
- It is essential for producing fermented dairy products like yogurt and kefir.
- Lactose can also be problematic, causing lactose intolerance and galactosemia, and is a major cheese industry byproduct.
Purpose of the Study:
- To explore the biochemical pathways of lactose synthesis and assimilation.
- To understand the enzymatic mechanisms involved in lactose hydrolysis.
- To highlight the industrial significance of lactose biotransformation.
Main Methods:
- Biochemical analysis of lactose synthesis and assimilation pathways.
- Enzymatic studies of lactose-hydrolyzing enzymes.
- Review of fermentative and enzymatic biotransformation processes.
Main Results:
- Lactose metabolism provides models for understanding broader biosynthetic and catabolic processes.
- Lactose-hydrolyzing enzymes share structural and phylogenetic links with beta-galactosidases and cellobiases.
- Biotransformation of lactose is industrially relevant for dairy and pharmaceutical applications.
Conclusions:
- The study of lactose offers valuable insights into fundamental biochemical processes.
- Enzymatic and fermentative approaches to lactose biotransformation are key for industrial applications.
- Understanding lactose biochemistry is critical for both nutritional and industrial contexts.