TABLE 3.

Information content for lattice walks

Lattice	Constraints*	W(N)*	Choices/residue	Bits/residue
2D Square	None	4N	4	2
	No reversal	3N	3	1.58
	Self-avoiding	0.103 (2.691N)	2.69	1.43
	Square Hamilton self-avoiding	0.269 (1.399N)	1.4	0.48
3D Cubic	None	6N	6	2.58
	No reversal	5N	5	2.32
	Self-avoiding (Chan and Dill, 1990)	0.293 (4.782N)	4.78	2.26
	Hamilton walk (Pande et al., 1994)	e−4.3±1.2 (1.86N)	1.86	0.90
	Flory, mean field (Flory, 1953)		1.84	0.88
3D Tetrahedral	None		4	2
	No reversal		3	1.58
	Self-avoiding (Wang et al., 1999)		1.72	0.78
Off lattice
Stochastic chains	Fit to extreme value distribution (Feldman and Hogue, 2002)			1.2–2.0
Protein backbone	Native → Compact (Dill, 1985)		1.7	0.76
Protein backbone + side chain	Native → Unfolded (Cooper, 1999)		7.5–20.5	2.9–4.4

^*W(N) for N ≫ 1.