Table 1. DNA-uracil concentrations reported in the literature.

A broad range of DNA-uracil concentrations from fresh or cultured cells has been reported by different researchers. Some of these concentrations are shown in the table above. “U” = uracil, “deficiency” = type of vitamin deficiency investigated for association with increased DNA-uracil.

	pg U/μg DNA		1000 U/ diploid cell
Reference	min	max	Min	max	organism / cell type / deficiency
Mashiyama et al. 2004 (24)	0.33	6.35	10	195	human / cultured primary lymphocytes / folate
Choi et al. 2003 (31)	3.89	5.09	119	156	rat / colon cells / folate
Ren et al. 2002 (30)	0.20	1.94	6	60	human / lymphocytes / folate
Crott et al. 2001 (29)	0.76	4.84	23	149	human / cultured primary lymphocytes / folate
Koury et al. 1997 (28)	0.43	1.77	13	54	mouse / erythroblasts / folate
Blount et al. 1997 (1)	1.66	129.02	51	4000	Human / cells from whole blood / folate
Ramsahoye et al. 1996 (27)	41.41	42.93	1271	1318	human / bone marrow cells / cobalamin
Blount et al. 1994 (26)	0.70	3.00	21	92	rat / hepatocytes / folate