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 Band Called Death on June 16. The film was released on DVD and blu-ray disc on August 13, 2013. Initial critical response to "A Band Called Death" was positive. At Metacritic, which assigns a normalized rating out of 100 to reviews from mainstream critics, the film has received an average score of 77, based on 14 reviews. A Band Called Death A Band Called Death is a 2012 American documentary film directed by Mark Christopher Covino and Jeff Howlett. The documentary is about the 1970s rock band Death and their new-found popularity decades after the group recorded their music. The film premiered at