A comparison of the positional distribution of fatty acids in milk triglycerides of the extant monotremes platypus (Ornithorhynchus anatinus) and echidna (Tachyglossus aculeatus) |
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Authors: | Peter W Parodi Mervyn Griffiths |
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Affiliation: | (1) Fats Research Laboratory, The Butter Marketing Board, Hamilton Central, 4007, Queensland, Australia;(2) Division of Wildlife and Rangelands Research, C.S.I.R.O., Canberra, A.C.T., Australia |
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Abstract: | Milk triglycerides from the platypus were subjected to fatty acid and stereospecific analysis to determine the positional
distribution of fatty acids in the triglycerides. Of the major fatty acids, 12∶0 was preferentially esterified at thesn-3 position, 14∶0 and 16∶0 were selectively associated with thesn-2 position, and 18∶0 was located predominantly at thesn-1 position. The unsaturated fatty acids, 14∶1, 16∶1, 18∶1, 18∶2 and 18∶3, were preferentially esterified at thesn-3 position. The fatty acid distribution pattern of the platypus, a monotreme, is similar to that of marsupials and eutherians
but is in contrast to the only other extant monotreme, the echidna. |
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