. 2008 Jan 23;105(4):1146–1151. doi: 10.1073/pnas.0710643105

Table 1.

Summary of empirical and computed Arrhenius parameters

1SLO mutant	Experimental Arrhenius parameters			Calculated Arrhenius parameters^*		Input parameters^†
1SLO mutant	E_a(H), kcal/mol	E_a(D) − E_a(H), kcal/mol	A_H/A_D	E_a(D) − E_a(H), kcal/mol	A_H/A_D	r₀, Å	Ω_Gating, cm⁻¹
WT	2.1 ± 0.2^‡	0.9 ± 0.2^‡	18 ± 5^‡	0.9^§	20^§	1.02^§	167^§
Ile⁵⁵³ → Val	2.4 ± 0.5	2.6 ± 0.5	0.3 ± 0.2	2.6	1.1	1.46	68
Ile⁵⁵³ → Leu	0.4 ± 0.7	3.4 ± 0.6	0.3 ± 0.4	3.4	0.33	1.85	52
Ile⁵⁵³ → Ala	1.9 ± 0.2^‡	4.0 ± 0.3^‡	0.12 ± 0.06^‡	4.0^§	0.11^§	2.34^§	42^§
Ile⁵⁵³ → Gly	0.03 ± 0.04	5.3 ± 0.7	0.027 ± 0.034	5.3	0.026	3.14	35

*Calculated by treating the hydrogen wave functions as Morse oscillators. The significance of these calculations is the trends in parameters, not their absolute magnitude.

^† r₀ is the initial distance that hydrogen would have to transfer between the donor and acceptor (prior to gating). Ω_gating is the frequency of the gating mode.

^‡Data from ref. 15.

^§Data from ref. 16.