Question: A scientist used molecular biological methods to insert the human β-globin gene into a bacterial …

A scientist used molecular biological methods to insert the
human β-globin gene into a bacterial cell’s chromosome, hoping the
cells will express it and synthesis a functional β-globin protein.
Instead, the protein produced is nonfunctional and is found to
contain considerably fewer amino acids than does the functional
β-globin made by a eukaryotic cell.

Explain why there would be this difference.