Table 4.

Palmitate and oleate enrichments in the morning and afternoon biopsy in both males and females

	Males		Females
	Morning	Afternoon	Morning	Afternoon
	Plasma free fatty acid 13C enrichment, MPE
Oleate	0.182 ± 0.021 (n = 21)		0.196 ± 0.024 (n = 20)
	imTG-fatty acid 13C enrichment, MPE
Palmitate	0.021 ± 0.002 (n = 20)	0.020 ± 0.001 (n = 20)	0.017 ± 0.002 (n = 21)	0.015 ± 0.002 (n = 21)
Oleate	0.010 ± 0.000** (n = 20)	0.012 ± 0.001 (n = 20)	0.008 ± 0.001* (n = 19)	0.009 ± 0.001 (n = 19)
	im Long chain acyl-carnitine fatty acid 13C enrichment, MPE
Palmitoyl	0.016 ± 0.002 (n = 20)	0.017 ± 0.002 (n = 20)	0.014 ± 0.002 (n = 19)	0.015 ± 0.003 (n = 19)
Oleoyl	0.001 ± 0.001* (n = 20)	0.002 ± 0.001 (n = 20)	0.001 ± 0.000* (n = 19)	0.002 ± 0.001 (n = 19)
	imNEFA fatty acid 13C enrichment, MPE
Palmitate	0.020 ± 0.003* (n = 13)	0.018 ± 0.002 (n = 13)	0.022 ± 0.002* (n = 19)	0.020 ± 0.002 (n = 19)
Oleate	0.008 ± 0.001** (n = 13)	0.012 ± 0.002 (n = 13)	0.005 ± 0.001** (n = 19)	0.008 ± 0.002 (n = 19)

Values are means ± SE; n, no. of subjects. The plasma oleate enrichments are those from the final 30 min of the insulin clamp. MPE, moles percent enrichment; im, intramyocellular.

^*P < 0.05 between A.M. and P.M. sample;

^**P < 0.01 between morning and afternoon samples.