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Immunologic Studies of Human Group I Pepsinogens

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Abstract The antigenic relationships of the human group I pepsinogens (Pg 1 through Pg 5) to each other, to the group II pepsinogens (Pg 6 and Pg 7) and to the slow moving protease (SMP) were examined. Rabbit antiserum to a preparation containing Pg 2, Pg 3 and Pg 4 formed precipitin arcs of identity against Pg 1 through Pg 5, but did not react against Pg 6, Pg 7 or SMP. The specificity of the antibodies for the group I pepsinogens was confirmed by immunoabsorption. The results indicate that the group I pepsinogens, although electrophoretically heterogeneous, are antigenically similar, and that the group I pepsinogens are immunologically unrelated to the group II pepsinogens and to the SMP.
Oxford University Press (OUP)
Title: Immunologic Studies of Human Group I Pepsinogens
Description:
Abstract The antigenic relationships of the human group I pepsinogens (Pg 1 through Pg 5) to each other, to the group II pepsinogens (Pg 6 and Pg 7) and to the slow moving protease (SMP) were examined.
Rabbit antiserum to a preparation containing Pg 2, Pg 3 and Pg 4 formed precipitin arcs of identity against Pg 1 through Pg 5, but did not react against Pg 6, Pg 7 or SMP.
The specificity of the antibodies for the group I pepsinogens was confirmed by immunoabsorption.
The results indicate that the group I pepsinogens, although electrophoretically heterogeneous, are antigenically similar, and that the group I pepsinogens are immunologically unrelated to the group II pepsinogens and to the SMP.

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