. 2002 Apr 25;3:6. doi: 10.1186/1471-2156-3-6

Table 5.

Fluctuation tests and analysis of mutations under selective conditions

Exp.^>A	Media /Mutation	Cultures with no mutants/total cultures	Number of mutants	Mean^B	Variance^C	Distribu-tion^D
1–1	LB leu^-leu⁺	3/10	1,1,1,2,2,2,2	1.10	0.767	P
1–2	CM leu^-leu⁺	0/10	16,16,18,19,21,21,24, 24,27,28	22.60	18.267	P
1–3	MM+P leu^-leu⁺	0/10	519,552,526,612,572,634,632,619, 601,597	586.4	1774.5	P
1–4	PB leu^-leu⁺	0/10	1,1,2,2,2,,3,3,4,5,8	3.10	4.545	P
2–1	LB leu^-leu⁺	34/45	3,16,27,37,85,116,146,326,680,372,1284	90.64	63989	LD
2–2	CM leu^-leu⁺	16/45	2,5,7,7,9,9,10,12,13,14,14,16,16,16,18,18,19,19,30,35,42,44, 48,50,62,75,104,126,231	23.80	1770.3	LD
2–3	MM+P leu^-leu⁺	22/45	1,2,2,3,3,4,6,6,8,8,9,10,11,13, 15,19,23,24,25,32,55,67,103	9.98	402.20	LD
3–1	MM+P leu^-leu⁺	14/45	1,1,1,3,3,4,4,13,21,66	4.875	193.42	LD
3–2	MM+P leu^-leu⁺	4/24	1,1,1,2,2,3,3,3,4,4,5,5,7,7,9,12,12,19,26,50	7.333	123.19	LD
3–3	MM+P leu^-leu⁺	11/24	1,1,1,2.3.7.9.12.14,21,29,33,38	7.125	134.03	LD
4–1	MM+L pro^-pro⁺	14/24	1,1,1,1,3,4,9,13,15,41	3.708	80.65	LD
4–2	MM+L Pro^-pro⁺	14/24	1,1,1,2,2,2,4,5,7,9,18,34	3.583	59.04	LD
4–3	MM+L pro^-pro⁺	14/24	1,1,1,1,2,2,3,3,5,11,11,12, 24,42	4.958	95.26	LD
5–1	CM-lac lac^-lac⁺	19/24	1,1, 4,23,38	2.792	78.43	LD
5–2	CM-lac lac^-lac⁺	14/24	1,1,1,1,2,2,2,6,30,44	3.750	110.89	LD
5–3	CM-lac lac^-lac⁺	11/14	1,1,1,2,2,2,3,3,5,6,9,14,72	5.042	214.99	LD

A: Experiments in group 1 (1–1 to 1–4) , aliquots from cultures in same flasks; experiments in other groups, each cultures were independent in a little tube or in a well of 48 wells microtittle. B: Mean of mutants. , here, n = number of cultures, x_i = number of mutants in a culture. C: Variance of simples. D: distribution patterns were judged by the Value of X². n = 10□ a_0.95 = 3.94; n = 24, a_0.95= = 13.848; n = 45 a_0.95 = 30.612. If the value of X² > a_0.95, the distribution type was non-Poisson pattern; If the value of X² < a_0.95, the distribution type was Poisson pattern.