Table 1.

Silencer elements are neither promoter- nor cell-type-specific

Construct generated with each promoter	% promoter activity
	B cell				T cell
	muB29 (−164)	huB29 (−193)	mb − 1 (−252)	c-fos (−71)	c-fos (−71)
	8 ± 6	6 ± 3	13 ± 3	1 ± 2	4 ± 3
	100	100	100	100	100
	30 ± 14	41 ± 15	58 ± 13	42 ± 22	50 ± 29
	36 ± 17	83 ± 27	60 ± 23	52 ± 8	ND
	41 ± 8	42 ± 15	37 ± 6	34 ± 13	49 ± 29
	23 ± 7	110 ± 41	61 ± 14	ND	ND

ND, not determined.