Catalysis of the reaction: succinate semialdehyde + NAD+ + H2O = succinate + NADH + H+.

Catalysis of the reaction: H(2)O + succinyl-CoA = CoA + H(+) + succinate.

Catalysis of the reaction: X-CoA + H2O = X + CoA; X may be any group.

Catalysis of the transfer of an adenylyl group from an adenosine nucleotide (ATP or ADP) to sulfate, forming adenylylsulfate.

Catalysis of the reaction: ADP + H(+) + sulfate = 5'-adenylyl sulfate + phosphate.

Catalysis of the reaction: ATP + sulfate = diphosphate + adenylylsulfate.

Catalysis of the reaction: 3-sulfino-L-alanine = hypotaurine + CO2.

Catalysis of the reaction: hydrogen sulfide + 3 NADP+ + 3 H2O = sulfite + 3 NADPH + 3 H+.

Catalysis of an oxidation-reduction (redox) reaction in which a sulfur-containing group acts as a hydrogen or electron donor and reduces NAD or NADP.

Catalysis of the reaction: hydrogen sulfide + acceptor + 3 H2O = sulfite + reduced acceptor.

Catalysis of the reaction: 2 superoxide + 2 H+ = O2 + hydrogen peroxide.

Inhibition of the reactions brought about by dioxygen (O2) or peroxides. Usually the antioxidant is effective because it can itself be more easily oxidized than the substance protected. The term is often applied to components that can trap free radicals, thereby breaking the chain reaction that normally leads to extensive biological damage.

OBSOLETE. (Was not defined before being made obsolete).

Catalysis of the reaction: thiamine diphosphate + H2O = thiamine monophosphate + phosphate.

Catalysis of the reaction: ATP + thiamine = AMP + thiamine diphosphate.

Catalysis of the reaction: 4-amino-2-methyl-5-diphosphomethylpyrimidine + 4-methyl-5-(2-phosphoethyl)-thiazole + H(+) = diphosphate + thiamine phosphate.

Catalysis of the reaction: S-adenosyl-L-methionine(1+) + dimethyl sulfide = S-adenosyl-L-homocysteine + trimethylsulfonium.

Catalysis of the reaction: NADP(+) + thioredoxin = H(+) + NADPH + thioredoxin disulfide.

Catalysis of the reaction: protein-dithiol + NAD(P)+ = protein-disulfide + NAD(P)H + H+.