Mitochondrial mRNAs have short poly-A sequences at their 3′ end. Poly-A tails are generally considered to be a feature of eukaryotic, not bacterial, mRNA. How can this observation be reconciled with an endosymbiotic origin for mitochondria?

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The Answer of Mitochondrial mRNAs have short poly-A sequences at their 3′ end. Poly-A tails are generally considered to be a feature of eukaryotic, not bacterial, mRNA. How can this observation be reconciled with an endosymbiotic origin for mitochondria?

Mitochondrial MRNAs Have Short Poly-A Sequences at Their 3′ End