What is "sulfation"

alt. (context chemistry English) The replacement of a hydrogen atom of an organic compound with a sulfate (-OSO₂OH) functional group, or the replacement of the hydrogen atoms of two molecules to form a sulfate (R-OSO₂O-R) n. (context chemistry English) The replacement of a hydrogen atom of an organic compound with a sulfate (-OSO₂OH) functional group, or the replacement of the hydrogen atoms of two molecules to form a sulfate (R-OSO₂O-R)

Sulfation or sulfurylation (not to be confused with sulfonation) in biochemistry is the enzyme-catalyzed conjugation of a sulfo group (not a sulfate or sulfuryl group) to another molecule. This biotransformation involves a sulfotransferase enzyme catalyzing the transfer of a sulfo group from a donor cosubstrate, usually 3'-phosphoadenosine-5'-phosphosulfate (PAPS), to a substrate molecule's hydroxyl or amine. Sulfation is involved in a variety of biological processes, including detoxification, hormone regulation, molecular recognition, cell signaling, and viral entry into cells. It is among the reactions in phase II drug metabolism, oftentimes effective in rendering a xenobiotic less active from a pharmacological and toxicological standpoint, but sometimes playing a role in the activation of xenobiotics (e.g. aromatic amines, methyl-substituted polycyclic aromatic hydrocarbons). Another example of biological sulfation is in the synthesis of sulfonated glycosaminoglycans, such as heparin, heparan sulfate, chondroitin sulfate, and dermatan sulfate. Sulfation is also a possible posttranslational modification of proteins.

1. redirect Lead–acid battery#Sulfation and desulfation