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triglycerides

A triglyceride (TG, triacylglycerol, TAG, or triacylglyceride) is an ester derived from glycerol and three fatty acids. There are many triglycerides: depending on the oil source, some are highly unsaturated, some less so.

Saturated compounds are "saturated" with hydrogen — all available places where hydrogen atoms could be bonded to carbon atoms are occupied. Unsaturated compounds have double bonds (C=C) between carbon atoms, reducing the number of places where hydrogen atoms can bond to carbon atoms. Saturated compounds have single bonds (C-C) between the carbon atoms, and the other bond is bound to hydrogen atoms (for example =CH-CH=, -CH2-CH2-, etc.).

Unsaturated fats have a lower melting point and are more likely to be liquid. Saturated fats have a higher melting point and are more likely to be solid at room temperature.

Triglycerides are the main constituents of vegetable oil (typically more unsaturated) and animal fats (typically more saturated). In humans, triglycerides are a mechanism for storing unused calories, and their high concentration in blood correlates with the consumption of starchy and other high carbohydrate foods. Triglycerides are a major component of human skin oils.





Example of an unsaturated fat triglyceride. Left part: glycerol, right part from top to bottom: palmitic acid, (contains)oleic acid, alpha-linolenic acid.


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CEBIO

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  • Jihočeská univerzita
  • Madeta
  • Forestina
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