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")
A New Form of Beauty A New Form of Beauty A New Form of Beauty Parts 1-4 is a 1983 compilation album by Irish post-punk band Virgin Prunes. It collected parts 1 through 4 of the "A New Form of Beauty" project, which were issued by Rough Trade Records during 1981 and 1982. "A New Form of Beauty 1" (1981), issued as a 7" single, featured the songs "Sandpaper Lullaby" and "Sleep / Fantasy Dreams". It was followed by the 10" single "A New Form of Beauty 2" (1981), which featured "Come to Daddy" and two other tracks. "A New Form of Beauty 3" (1981)