Table 1.

Fractions of functions that are RoFs, non-NCF RoFs, or NCFs, in the space of all BFs (f₀) or in the reference biological dataset (f₁). E( = f₁/f₀) is the enrichment ratio; it indicates the extent of the over-representation of such functions in the reference dataset. Over-representation is highest for NCFs but clearly non-NCF RoFs are also highly over-represented. Computations are reported for functions with k ≤ 8 inputs.

k	RoF			non-NCF RoF			NCF
	f 0	f 1	E	f 0	f 1	E	f 0	f 1	E
1	0.5	1.000	2.000	0	0	–	0.5	1.000	2.00
2	0.5	0.977	1.953	0	0	–	0.5	0.977	1.95
3	0.250	0.917	3.670	0	0	–	0.25	0.917	3.67
4	1.27 × 10−2	0.946	74.495	1.46 × 10−3	5.43 × 10−2	37.04	1.12 × 10−2	8.91 × 10−1	79.38
5	3.52 × 10−6	0.853	2.42 × 105	1.04 × 10−6	0.083	7.99 × 104	2.47 × 10−6	0.769	3.11 × 105
6	1.91 × 10−14	0.776	4.06 × 1013	9.12 × 10−15	0.150	1.64 × 1013	9.97 × 10−15	0.626	6.28 × 1013
7	2.95 × 10−32	0.804	2.73 × 1031	1.86 × 10−32	0.137	7.39 × 1030	1.09 × 10−32	0.667	6.11 × 1031
8	2.92 × 10−69	0.756	2.59 × 1068	2.18 × 10−69	0.156	7.14 × 1067	7.41 × 10−70	0.600	8.10 × 1068