Authors: Nowotarski SL, Woster PM, Casero RA PMID: 23432971 PMCID: PMC4027058 DOI: 10.1017/erm.2013.3 Abstract Polyamines are small organic cations that are essential for normal cell growth and development in eukaryotes. Under normal physiological conditions, intracellular polyamine concentrations are tightly regulated through a dynamic network of biosynthetic and catabolic enzymes, and a poorly characterised transport system. [...]