Structural Data on Chicken IgA and Failure to Identify the IgA of the Tortoise
In 1972, our group had demonstrated the existence in chicken serum, intestinal secretions and bile, of an immunoglobulin (Ig) which was clearly physicochemically and antigenically different from chicken IgM and IgG (1). The occurrence of this Ig at relatively high concentrations in bile, saliva, seminal plasma, lachrymal and intestinal secretions (2), and in the majority of plasma cells from the lamina propria of the intestinal mucosa (3), has allowed us to call this Ig the chicken homologue of mammalian IgA. These findings have since been confirmed by several groups (4–9).
KeywordsSeminal Plasma Specific Antiserum Secretory Component Intestinal Secretion Chicken Serum
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