Macnaha qaamuuska ereyga decarboxylase waa ensaymes ka soo saara kooxda kaarboxyl (-COOH) ka saarida molecule organic, inta badan waxay keentaa in la sii daayo carbon dioxide (CO2). Decarboxylases waxay muhiim u yihiin dariiqyada biochemical ee kala duwan waxaana laga helaa labadaba prokaryotic iyo eukaryotic organisms. Tusaalooyinka qaar ee decarboxylases waxaa ka mid ah amino acid decarboxylases, kuwaas oo kicinaya ka saarista kooxda karboksyl ee amino acid, iyo pyruvate decarboxylase, taas oo kicinaysa ka saarista kooxda karboksyl ee pyruvate si ay u sameeyaan acetaldehyde.