Table 5. Optimization results for the four test systems.

		Proteins	Functional	Promoters	Delay
			Units	(Repressed/Activated/Constitutive)	Stages
Single-Not	Unoptimized	4	4	4 (2/1/1)	3
	Optimized	3	3	3 (2/0/1)	2
	% Improvement	25%	25%	33%	33%
Three-Gate	Unoptimized	10	10	9 (7/1/1)	5
	Optimized	4	5	4 (3/0/1)	2
	% Improvement	60%	50%	55%	60%
Quad-Not	Unoptimized	7	7	7 (5/1/1)	6
	Optimized	2	2	2 (1/0/1)	1
	% Improvement	71%	71%	71%	83%
2-bit adder	Unoptimized	55	56	53 (37/15/1)	12
	Optimized	26	23	24 (19/4/1)	7
	% Improvement	52%	59%	55%	42%