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Competitive deposition of trans ‐12‐ and cis ‐9‐octadecenoates into egg yolk lipids
Author(s) -
Lanser A. C.,
Emken E. A.
Publication year - 1981
Publication title -
lipids
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.601
H-Index - 120
eISSN - 1558-9307
pISSN - 0024-4201
DOI - 10.1007/bf02534915
Subject(s) - lipidology , yolk , chemistry , clinical chemistry , stereochemistry , chromatography , biochemistry , food science
The deposition of trans ‐12‐octadecenoate‐12(13)‐ 3 H (12 t ‐18∶1‐ 3 H) was compared to cis ‐9‐octadecenoate‐10‐ 14 C (9 c ‐18∶1‐ 14 C) in the major egg yolk neutral lipids and phospholipids. trans ‐12‐Octadecenoate was preferentially incorporated into cholesteryl esters (CE), phosphatidylcholines (PC), and phosphatidylethanolamines (PE) but was discriminated against in triglycerides (TG). Isotopic ratios indicate that 5.9 and 5.6 times more 12 t ‐18∶1‐ 3 H than 9 c ‐18∶1‐ 14 C was esterified at the 1‐acyl position of PE and PC, respectively. The combined 1‐ and 3‐acyl positions of TG and the 2‐acyl position of TG, PE and PC were each preferentially esterified with 9 c ‐18∶1‐ 14 C.