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. 2021 Sep 10;71:103562. doi: 10.1016/j.ebiom.2021.103562

Table 3.

Carbohydrate xenoantigens that have been deleted in genetically-engineered pigs.

Carbohydrate (Abbreviation) Responsible enzyme Gene-knockout pig

1. Galactose-α1,3-galactose (Gal)
α1,3-galactosyltransferase GTKO
2. N-glycolylneuraminic acid (Neu5Gc)
Cytidine monophosphate-N-acetylneuraminic acid hydroxylase (CMAH)
CMAH-KO
3. Sda β-1,4N-acetylgalactosaminyltransferase β4GalNT2-KO