Developmental expression and tissue distribution of Zfp36l2 mRNA. Total cellular RNA (15 μg) was isolated from yolk sacs, placentas, and whole embryos at the indicated gestational stages (A) and from adult mouse tissues and E14.5 liver (B). Northern blots were hybridized with a ³²P-labeled 787-bp 3′UTR probe for Zfp36l2. The positions of Zfp36l2 mRNA and the ribosomal RNAs are shown to the left of the blot. The bottom panels show acridine orange staining of the samples as loading controls.