ACC = 1-aminocyclopropane-1-carboxylic acid

ATP = adenosine triphosphate

AMP = adenosine monophosphate

APS^2- (APS) = adenosine-5'-phosphosulfate

CarS-SO₃^- [R-S-SO₃^-] = sulfocarrier (e.g. GS-SO₃^- = S-sulfoglutathione)

CarS-SH [R-S-S^-] = carrier thiol

Cys = cysteine

DMS = dimethylsulfide

DMSP = 3-dimethylsulfoniopropionate

DTE = dithioerythritol

DTT = dithiothreitol

DTNB = 5,5'-dithiobis-(2-nitrobenzoic acid)

Fd = ferredoxin (red = reduced; ox = oxidized)

Glu = glutamate

GSH = reduced glutathione

GSSG = oxidized glutathione

HC = HCy = homocysteine

H₂S = hydrogen sulfide

N⁵Me-H₄PteGlu = 5-methyltetrahydropteroyltriglutamate

Met = methionine

OAS = O-acetylserine

OPH = O-phosphohomoserine

PAPS = 3'-phosphoadenosine-5'-phosphosulfate

PAP = 3'-phosphoadenosine-5'-phosphate

PCs = phytochelatins

Pi = inorganic phosphate

PPi = pyrophosphate

SO₄^2- = sulfate (US) = sulphate (U.K)

SO₃^2- = sulfite

S^2- = sulfide

SAM = AdoMet = S-adenosylmethionine

SMM = S-methylmethionine

SAHC = SAHCy = AdoHcy = S-adenosylhomocysteine

SiR = sulfite reductase