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Lactose Permease
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(New page: ====Function of Lactose Permease==== (Caption) Lactose Permease is a transmembrane protein that facilitates the passage of lactose across the phospholipid b...) |
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it is brought into cells in the digestive system by the protein Lactose Permease. Here it is | it is brought into cells in the digestive system by the protein Lactose Permease. Here it is | ||
broken down into its monosaccharide subunits by the enzyme lactase so it may be used in the | broken down into its monosaccharide subunits by the enzyme lactase so it may be used in the | ||
| - | process of cellular respiration.<ref name=Gita C. Gidwani>[http://www.faqs.org/nutrition/Kwa-Men/Lactose-Intolerance.html]<ref/> | + | process of cellular respiration.<ref name="Gita C. Gidwani">[http://www.faqs.org/nutrition/Kwa-Men/Lactose-Intolerance.html]<ref/> |
====Structure of Lactose Permease==== | ====Structure of Lactose Permease==== | ||
Revision as of 16:49, 14 January 2009
Function of Lactose Permease
facilitates the passage of lactose across the phospholipid bi-layer of the cell membrane. The transport mechanism used is an active co-transport that uses the inwardly directed H+ electrochemical gradient as its driving force. As a result, the lactose is accompanied from the periplasm to the cytoplasm of the cell by an H+ proton.[1]
Lactose is a disaccharide carbohydrate found primarily in mammalian milk. It is a disaccharide composed of the monosaccharides glucose and galactose. When lactose is ingested, it is brought into cells in the digestive system by the protein Lactose Permease. Here it is broken down into its monosaccharide subunits by the enzyme lactase so it may be used in the process of cellular respiration.[2]
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