Chapter 18. Lactase


Bartosz Ziobro, David Aebisher and Dorota Bartusik-Aebisher
Medical College of The University of Rzeszów, Poland

Part of the book: The Biochemical Guide to Enzymes


Lactase (LPH-Lactase phlorozin hydrolase) is a protein with a molecular weight of about 160 kDa belonging to the 𝛽-galactosidase enzymes. LPH is found in the enterocyte cell membrane that forms the brush border of the small intestine. This is a characteristic feature of mammals, with the greatest amount of LPH being found in the middle of the small intestine. The gene encoding LPH is located on the long arm of the second chromosome (2q21).

Keywords: enzymes, lactase phlorozin hydrolase, biochemistry


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