Fig. 9.
Elovl4 Tg mRNA is not expressed in the retina. Nuclease protection assay for wt Elovl4, Stgd3, and Tg mRNAs. A: The skin of three-week-old Tg mice expresses Tg mRNA in addition to wt Elovl4 mRNA and/or Stgd3 mRNA. The eyecups of three-week-old TgA+C/homozygous Stgd3 mice (Tg St/St) express Stgd3 mRNA but neither wt Elovl4 mRNA nor Tg mRNA. In this assay, wt Elovl4 mRNA protects a 342-N fragment of the 414-N riboprobe, Tg mRNA protects a 287-N fragment, and Stgd3 mRNA protects two fragments of 230 and 107 Ns, as shown in schematic form in B.