2.7.4.24 diphosphoinositol-pentakisphosphate 1-kinase AR4-2J cell - 645049 4.1.1.17 ornithine decarboxylase AR4-2J cell AR4-2J pancreatic tumor cells, which show increased phosphorylation of the eIF4E regulatory protein 4E-BP1 and high levels of eIF4E compared to normal cells, also exhibit increased translational initiation of ODC mRNA 677508