Contributes to immunoglobulin receptor binding activity. Involved in antibacterial humoral response; glomerular filtration; and positive regulation of respiratory burst. Located in extracellular space. Part of monomeric IgA immunoglobulin complex and secretory dimeric IgA immunoglobulin complex. [provided by Alliance of Genome Resources, Apr 2022] see less Contributes to immunoglobulin receptor binding activity. Involved in antibacterial humoral response; glomerular filtration; and positive regulation of respiratory burst. Located in extracellular space. Part of monomeric IgA immunoglobulin complex and secretory dimeric IgA immunoglobulin complex. [provided by Alliance of Genome Resources, Apr 2022]