Chez Charles/ biblio/ Human beta-globin mRNAs that harbor a nonsense codon are degraded in murine erythroid tissues to intermediates lacking regions of exon I or exons I and II that have a cap-like structure at the 5' termini. Edit RecentChanges History Preferences Branchable The capped products appear together with the full length mRNA, and are found in the cytoplasmic compartment. Their expression ratios with the full length are differents in different tissues.