Polyamines The polyamines - putrescine, spermidine, and spermine - constitute a group of cell components that are important in the regulation of cell proliferation and cell differentiation. There is also evidence suggesting a role for polyamines in programmed cell death. Although their exact functions have not yet been identified, it is clear that the polyamines play important roles in a number of cellular processes such as replication, transcription, and translation. |