TABLE 5.

Concentrations of ¹³C in C atoms of SCFA after incubation with [1-¹³C]glucose

Incorporation of 13C		Aneg group		Apos group		P valueb
SCFA	Position	% 13C enrichment of C atom	13C concn (mM)a	% 13C enrichment of C atom	13C concn (mM)a
Acetate	CH3	24.09	9.80	21.18	9.59
	COOH	2.61	1.09	1.40	0.64	<0.0004
	CH3	15.56	2.57	14.07	3.40	<0.0002
Butyrate	CH2	0.47	0.11	0.32	0.10	<0.0003
	CH2	15.00	2.49	13.77	3.34
	COOH	0.13	0.02	0.00	0.00	<0.04
Propionate	CH3	13.06	1.87	7.29	0.90
	CH2	12.27	1.78	6.78	0.85	<0.03
	COOH	0.00	0.00	0.00	0.00
	CO2	2.19		2.44

^aCalculated by multiplying the SCFA concentration shown in Table 1 by the percent ¹³C enrichment divided by 100. 

^bProbability that the Aneg group and Apos group values are different, as determined by Student’s t test.