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 Pain song "Holy" appeared on the "Saw II" soundtrack. A Band Called Pain is also notable for being a rare heavy metal band consisting of four African American members. Guitarist Bivens alluded to this saying: The band is also the only heavy metal act released on the independent, alternative hip hop label, Hieroglyphics Imperium Recordings. ABCP has performed at the South By Southwest festival in Austin, Texas. In October 2008, Tony Providence left the band and was replaced by Akili Peyton the following year. A Band Called Pain A Band Called Pain (abbreviated ABCP) is an American heavy metal band from