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  • Title: Turtle-dove ovomucoid, a glycoprotein proteinase inhibitor with P1-blood-group antigen activity.
    Author: François-Gerard C, Gerday C, Beeley JG.
    Journal: Biochem J; 1979 Feb 01; 177(2):679-85. PubMed ID: 435257.
    Abstract:
    Ovomucoid from the egg white of turtle-dove (Streptopelia risoria) was purified and shown to be a glycoprotein of mol. wt. 29 400, with valine as N-terminal residue. It is an inhibitor of both trypsin and chymotrypsin, but has a lower affinity for trypsin than has hen ovomucoid. Turtle-dove ovomucoid contains antigenic activity cross-reacting with the blood-group-P1 antigen of human erythrocytes. Hen ovomucoid has no detectable blood group-P1 activity. The carbohydrate composition of turtle-dove ovomucoid differs from hen ovomucoid in having substantially higher galactose content. The possible relationship between carbohydrate composition and antigenic activity is discussed.
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