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")
The Return of a Man Called Horse The Return of a Man Called Horse The Return of a Man Called Horse is a 1976 American-Mexican western film directed by Irvin Kershner involving a conflict over territory between Sioux Indians and white men. It is the sequel to "A Man Called Horse" and it was followed by "Triumphs of a Man Called Horse" in 1982. Richard Harris reprises his role as Horse, a British aristocrat who has become a member of a tribe of Lakota Sioux. Trappers with government support force the Yellow Hands Sioux off their sacred land. The Indians retreat, but await supernatural punishment to descend