Table 1. Frequencies of lacZ gene invasion at various sites on the RMO17 chromosome.

Insertion	Invasion frequency (%)
		LAG	LEAD
1	36.60 ± 2.86	0.53 ± 0.13
2	22.86 ± 3.26	-
3	26.83 ± 2.06	2.80 ± 1.14
4	-	7.53 ± 0.81
5	24.56 ± 1.06	-

Data are means ± standard deviations for at least three independent experiments. -, not determined.