Table 1.

Inhibitory effects of MEFL on direct mutagenicity induced by 2-nitrofluorene (NF) in TA98 cells or sodium azide phosphate (SA) in TA100 cells without the S9 mix.

Direct		TA98		TA100
	Concentration (μg/well)b	Number of revertants per plate±SD	% inhibition of mutation	Number of revertants per plate±SD	% inhibition of mutation
	15.625	294±16	29	216±19	27
	31.25	322±8	18	247±6	15
	62.5	302±12	26	196±14	34
	125	228±25	56	238±8	19
	250	196±19	69	172±11	43
	500	163±7	82	133±31	58
	SR	119±21		19±5±8
	Sodium azide (0.5)	----		288+7
	2-Nitrofluorene	366±41		---
Indirect
	15.625	126±6	6	271±4	7
	31.25	121±9	12	279±16	3
	62.5	112±13	22	267±13	9
	125	86±24	49	224±11	31
	250	94±5	41	197±23	46
	500	79±7	57	164±8	63
	SR	39±5		93±2
	2-anthramine (0.1)	132±17		284±6

Values are the mean±S.E.M.

a Without the S9 mix.

b n = 3.

c With the S9 mix, n = 3.