Table 2. Macrophage specificities of synthetic promoters.

	RAW264.7/293 T	RAW264.7/HeLa
Control	1.0±0	1.0±0
SP107	1.1±0.1	2.3±1.7
SP146	0.8±0.3	1.5±0.7
SP107-C1	32.3±8.2	50.1±25.6
SP107-C2	19.6±1.67	32.5±14.2
SP107-C3	13.6±1.5	11.2±5.8
SP146-C1	20.1±5.1	76.1±21.2
SP146-C2	6.9±3.3	14.0±8.6
SP146-C3	3.5±1.6	8.0±6.1

Promoter activities were used to represent macrophage specificity as the ratio of RAW264.7/293 T and RAW264.7/HeLa. Data shown are means±s.d.'s.