Table IV.

Relative mRNA half-lives of wild-type and synthetic B.t.-toxin transcripts (BT) in stably transformed tobacco BY-2 cells

B.t.-Toxin Gene	Cell Line	B.t.-Toxin mRNA Half-Life	GUS mRNA Half-Life	Relative Half-Life	Average Relative Half-Life
		min		BT/GUS
Wild type	WT1	17	64	0.27
		22	63	0.35
	WT2	15	47	0.32	0.33
		24	62	0.38
Synthetic	SYN1	68	65	1.05
	SYN2	45	40	1.13	1.19a
	SYN3	85	61	1.39

^ase ± 0.10.