. Author manuscript; available in PMC: 2019 Feb 7.

Published in final edited form as: Biochemistry. 2017 Feb 7;56(7):986–996. doi: 10.1021/acs.biochem.6b01093

Table 2.

Steady-state kinetic parameters for H₂S oxidation with various sulfane sulfur acceptors

Acceptor	K_{m sulfide} (μM)	K_{m acceptor} (mM)	k_cat(S⁻¹)	k_cat/K_{m acceptor} (M⁻¹s⁻¹)
sulfite^a	13 ± 3	0.174 ± 0.02	370 ± 14	2.1 × 10⁶
glutathione	10 ± 1^b	22 ± 2	100 ± 2	4.5 × 10³
cysteine^b	5 ± 1	23 ± 4	94 ± 4	4.1 × 10³
sulfide^a		0.315 ± 0.028	65 ± 2	2.1 × 10⁵

Data from Jackson et al.²⁷.

Data from Libiad et al.¹