Polycations at physiological pH, polyamines can bind and interact with various other molecules within the cell. In particular interact with DNA but also may modulate ion channels and act as growth factors. Spermine has four positive charges, spermidine has three. The precursor of both, putrescine, has two.

Dictionary of molecular biology. 2004.

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  • Polyamine oxidase — In enzymology, a polyamine oxidase (EC number| is an enzyme that catalyzes the chemical reaction:N1 acetylspermine + O2 + H2O ightleftharpoons N1 acetylspermidine + 3 aminopropanal + H2O2The 3 substrates of this enzyme are N1… …   Wikipedia

  • polyamine oxidase — noun Any enzyme that catalyzes the oxidation of a polyamine, but especially of acetylspermine to acetylspermidine and aminopropanal …   Wiktionary

  • polyamine — noun Date: 1861 a compound characterized by more than one amino group …   New Collegiate Dictionary

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