... independently of the presence of AREs (Fig. 6B, lanes 2 and 5). It is possiblethat in the region located before the AREs, consisting of 343 bp of the 3¢ UTR of the IL-1b transcript, there is aputative ... prevented the increase in the MCPIP mRNA level for both forms(Fig. 5A, lanes 5 and 6, upper bands). Moreover, in aco-transfection study with the IL-1b-expressing vector, the level of mRNA for the ... panel) and MCPIP (bottom panel) was determinedby Northern blot. The middle panel shows inverted images of ethidium bromide-stained 18S and 28S rRNA on the membrane. The graphsbelow the Northern...