Immunoglobulin A only weakly. IgA exists in two isotypes, IgA1 and IgA2. They are both heavily glycosylated proteins. While IgA1 predominates in serum (~80%), IgA2 percentages are higher in secretions than in serum (~35% in secretions); the ratio of IgA1 and IgA2 secreting cells varies in the different lymphoid tissues of the human body: Both IgA1 and IgA2 have been found in external secretions like colostrum, maternal milk, tears and saliva, where IgA2 is more prominent than in the blood. Polysaccharide antigens tend to induce more IgA2 than protein antigens. Both IgA1 and IgA2 can be in membrane-bound form. ("see B-cell receptor")
Triumphs of a Man Called Horse Triumphs of a Man Called Horse Triumphs of a Man Called Horse is a 1983 American-Mexican-Canadian Western film directed by John Hough and starring Richard Harris, Michael Beck and Ana De Sade. Harris reprised his role as British aristocrat John Morgan, 8th Earl of Kildare, who becomes a member of the Lakota Sioux. It was the final film of the trilogy after "A Man Called Horse" (1970) and "The Return of a Man Called Horse" (1976). Now in his 60s, Morgan is the chief of the Sioux and is much hated by white men because "many's a white man's died