"IgA"@en-us . "114178131"@en-us . . . "0"^^ . "0"^^ . . . . "115030853"^^ . . . . . "immunoglobulin A"@en-us . . "one of the most common of the five major classes of immunoglobulins; the chief antibody in the membranes of the gastrointestinal and respiratory tracts"@en-us . . "immunoglobulin A"^^ . "15030853-n"^^ .