TABLE 4

In Vitro Metabolism of [¹⁴C]Acetate by Human Tumors

Tumor type	Tumor sample	Incubation time (min)	Percentage of total ¹⁴C in acid extract
Tumor type	Tumor sample	Incubation time (min)	Unmetabolized [¹⁴C]acetate	Acidic + any neutral metabolites	Amino acids + any basic metabolites
Glioblastoma	1	10	101	2	3
		20	63	12	29
	2	10	76	10	16
		20	20	25	52
	3	10	37	17	51
		20	20	17	59
Meningioma	1	10	58	22	24
		40	41	26	27
	2	10	42	30	29
		20	22	35	47
	3	10	11	29	60
		20	12	30	58

Protein content of acid-extracted slices was 0.06–1.2 mg per sample. Recovery of ¹⁴C in fractions of acid extract was 101% ± 4%.