. 2003 Feb 28;548(Pt 2):541–548. doi: 10.1113/jphysiol.2002.033761

Table 1.

Non-steady-state and steady-state analyses after infusion of [2,4,6,8-¹³C₄]octanoate for 90 or 105 min

	Gastrocnemius

	Red (IIa)		White (IIb)		Soleus (I)

	Rested	Contracted	Rested	Contracted	Rested	Contracted
Non-steady-state analysis (90 min)
F_C2	0.502 ± 0.067^b	0.483 ± 0.050^b	0.296 ± 0.018^a ^c	0.278 ± 0.065^a ^c	0.516 ± 0.15^b	0.550 ± 0.072^b
F_CO	0.498 ± 0.067^b	0.517 ± 0.050^b	0.704 ± 0.018^a ^c	0.722 ± 0.065^a ^c	0.484 ± 0.15^b	0.450 ± 0.072^b
Steady-state analysis (90 min)
F_C2	0.442 ± 0.063^b	0.432 ± 0.043^b	0.274 ± 0.044^a ^c	0.265 ± 0.046^a ^c	0.482 ± 0.11^b	0.477 ± 0.089^b
F_CO	0.558 ± 0.063^b	0.568 ± 0.043^b	0.726 ± 0.044^a ^c	0.735 ± 0.046^a ^c	0.518 ± 0.11^b	0.523 ± 0.089^b
Non-steady-state analysis (105 min)
F_C2	0.592 ± 0.12^b	0.526 ± 0.071^b	0.250 ± 0.035^a ^c	0.258 ± 0.10^a ^c	0.594 ± 0.099^b	0.588 ± 0.11^b
F_CO	0.408 ± 0.12^b	0.474 ± 0.071^b	0.750 ± 0.035^a ^c	0.742 ± 0.10^a ^c	0.406 ± 0.099^b	0.412 ± 0.11^b
Steady-state analysis (105 min)
F_C2	0.489 ± 0.070^b	0.469 ± 0.051^b	0.252 ± 0.030^a ^c	0.285 ± 0.072^a ^c	0.555 ± 0.089^b	0.550 ± 0.072^b
F_CO	0.511 ± 0.070^b	0.531 ± 0.051^b	0.748 ± 0.030^a ^c	0.715 ± 0.072^a ^c	0.445 ± 0.089^b	0.450 ± 0.072^b

Results are listed as means ±s.d. (n = 5). F_C2 represents the fractional enrichment of the acetyl-CoA pool from metabolism of [2,4,6,8-¹³C₄]octanoate and F_CO corresponds to the contribution from unlabelled endogenous substrates to the acetyl-CoA pool. No differences were found between non-steady-state and steady-state analyses in either 90 or 105 min infusions, nor were any differences found in 90 versus 105 min non-steady-state or steady-state values.

Different from predominantly red gastrocnemius muscle type Ha (Ha) same condition (rested or contracted)

different from white gastrocnemius muscle type IIb (IIb) same condition

different from soleus muscle same condition.