Table 3.

Effect of gadX, gadY, and gadXY on btuB promoter

Plasmids	β-galactosidase activity a	% inhibition b
(A): pGAD10/pC-lacZ	0
(B): pGAD10/pCB1285lacZ	48.8 ± 3.9
(C): pGadXY/pCB1285lacZ	22.3 ± 0.7	54.4
(D): pGadX/pCB1285lacZ	38.9 ± 2.6	20.5
(E): pGadY/pCB1285lacZ	38.9 ± 2.0	20.3

^aMiller unit

^bCalculated according to the following equation: 1- [β-galactosidase activity of (C), (D), or (E) ÷ β-galactosidase activity of (A)] × 100%.