Biologically active diamines - putrescine (1,4-diaminobutane) and cadaverine (1,5-diaminopentane) are formed by the decay of proteins under the action of microorganisms (in the tissues of corpses, in the large intestine). What kind of reaction is formation of these diamines?

Decarboxylation

Biogenic ammines

elimination of the carboxyl group in the form of CO2