TABLE 1.

Kinetics and thermodynamics of Cu_A-heme a ET equilibration at 25° C and pH 7.5

Kinetic parameters	k / s−1	ΔH≠/kJ mol−1	ΔS≠/J K−1 mol−1
Forward (bacterial)*	20,400 ± 1500	22.2 ± 1.2	−88 ± 2
(bovine)†	13,000 ± 1200	11.4 ± 0.9	−128 ± 11
Reverse (bacterial)*	10,030 ± 800	24.6 ± 1.3	−86 ± 2
(bovine)†	3700 ± 300	13.4 ± 1.0	−131 ± 11
Equilibrium data	K	ΔH0/kJ mol∼1	ΔS0/J K∼1 mol∼1
(bacterial)*	2.0 ± 0.1	−2.4 ± 0.7	−2.6 ± 2.4
(bovine)†	3.4 ± 0.5	−2.0 ± 0.3	3 ± 5

^*This work.

^†Farver et al. (49).