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What are the differences between the structures of linoleic and linolenic acids?
Wiki User
∙ 9y ago
Both are poly unsaturated fatty acids(PUFA),each with three(3) double bonds;
Alpha has its 3 double bonds at carbon-9,12 and 15,so starting from carboxyl end(delta),it has its first double bond at C-9.Whenever drawing the alpha linolenic structure from carboxyl end,the first double bond falls on ODD carbon number,hence the name,alpha.It is called omega 3(C-3 from methyl or N side) OR by deducting last double bond, that is,carbon 15 from the total number of carbon in linolenic acid,18.Ditto for Beta linolenic acid.
Beta linolenic has its own 3 double bonds at Carbon-6,9 and 12.So when drawing its structures from carboxyl end it falls on EVEN Carbon number.Hence the name,beta.It is called omega 6 following the same procedures above.thanks
Answer provided by Ademiju Adediti (ademiju_adediti@Yahoo.com)
Wiki User
∙ 11y ago
Wiki User
∙ 9y agoBased on its structure, linoleic acid is named (9Z,12Z)-9,12-Octadecadienoic acid. Linolenic acid can either be (9Z,12Z,15Z)-9,12,15-Octadecatrienoic acid (also known as alpha-Linolenic acid) or all-cis-6,9,12-octadecatrienoic acid (beta-Linolenic acid).
Wiki User
∙ 9y agoLinoleic acid is more saturated and has one less C=C double bond. The first C=C double bond in linoleic acid also occurs further from the end of the hydrocarbon chain.
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