In the BioNTech/Pfizer mRNA, the 3' (or the latter) half of the 3'-UTR comes from human mitochondrial 12S rRNA. The Moderna one has the 3'-UTR of the alpha sub

In the BioNTech/Pfizer mRNA, the 3' (or the latter) half of the 3'-UTR comes from human mitochondrial 12S rRNA. The Moderna one has the 3'-UTR of the alpha subunit of human hemoglobin.