TY - RPRT TI - Spermidine requirement for cell proliferation in eukaryotic cells: structural specificity and quantitation. AU - C W Porter AU - R J Bergeron PY - 1983 DO - 10.1126/science.6823570 UR - https://pubmed.ncbi.nlm.nih.gov/6823570/ ID - 6823570 ER -