TABLE 2.

Deletion rates of Laac vectors

Expt no.	Deletion rate ofa:
	ET Laac-117			ET Laac-284			ET Laac-971
	No. of blue colonies	No. of white colonies	% Deletion	No. of blue colonies	No. of white colonies	% Deletion	No. of blue colonies	No. of white colonies	% Deletion
1	6	89	6.3	35	154	18.5	43	25	63.2
2	10	179	5.3	54	124	30.3	48	30	61.5
3	5	134	3.6	50	104	32.5	47	38	55.3
Avg			5.1			27.1			60.0
SD			1.4			7.5			4.2

^a% Deletion was determined by dividing the number of blue colonies by the total number of colonies and multiplying by 100.