(F) Click-iT AHA (L-azidohomoalaine) experiments were performed using IgG, anti-SPI1 or anti-PHF12 antibody. P493-6 cells expressing NTC or YTHDF3 shRNAs were incubated for 1 hour in medium containing 100 ug/mL AHA. The translated proteins were detected by Western blot. Arrow indicates translated MRGs. 