Table 1.

Time course of recombination products at malK as scored by colony colour

Time (min) before plating	Half white/red colonies		Full white no./7000
	Percent	no./7000
5	93	13	1
10	92	11	1
15	86	12	2
20	81	13	3
25	76	13	4
30	77	10	3
60	40	6	9