Discovery of VEGF-Ax, a novel, antiangiogenic isoform of VEGF-A
VEGF-Ax is generated by programmed translational readthrough (PTR) of VEGFA mRNA
Ax is a dual-function RNA element that drives PTR and encodes peptide extension
PTR is enhanced by hnRNP A2/B1, a trans-acting protein that binds Ax element