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ÎÄÏ×£ºMechanism by Which Fatty Acids Inhibit Insulin Activation of
Insulin Receptor Substrate-1 (IRS-1)-associated Phosphatidylinositol
3-Kinase Activity in Muscle

ÃèÊöÈçÏ£ºLCACoAs were extracted from frozen tissue samples (100 mg)
and purified using a solid phase extraction method described previously
by Deutsch et al. (15) with minor modifications for desalting. A known
amount of heptadecanoyl-CoA was added as an internal standard. OPC
columns (Applied Biosystems, Foster City, CA) were used for solid
phase extraction. Samples were dissolved in 100 l of methanol/H2O for
LC/MS/MS analysis.

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