Immunoglobulin A, Secretory

**Definition:** The principle immunoglobulin in exocrine secretions such as milk, respiratory and intestinal mucin, saliva and tears. The complete molecule (around 400 kD) is composed of two four-chain units of IMMUNOGLOBULIN A, one SECRETORY COMPONENT and one J chain (IMMUNOGLOBULIN J-CHAINS).

**Tree numbers:** - D12.776.124.486.485.114.619.026.030 - D12.776.124.790.651.114.619.026.030 - D12.776.377.715.548.114.619.026.030

**Synonyms:** - IgA, Secretory - Secretory IgA - Secretory Immunoglobulin A - SIgA - IgA, Exocrine