Immunoglobulin present in mouth local secretion s-
Correct Answer: IgA
Description: Ans. is 'a' i.e., IgA IgAo It is the second most abundant antibody (after IgG).o It is major immunoglobulin in clostrum, saliva, tears, respiratory and gastrointestinal secretions. Ig A occurs in two forms.IgASerum IgASecretory IgA (SIgA)o Monomero Dimero Found in serumo Two monomer units are joined together by a glycopeptide - Jchain o Contains glycine rich polypeptide secretory component, which protectsIgA from denaturation by bacterial proteases.o SIg A and J chain are synthesized by plasma cells.o Secretory component is produced by mucosal or glandular epithelial cells.o Two subclasses of IgA have been described Ig A| & Ig A?.IgAI - Predominant serum Ig AIg A2 - Predominant secretory Ig A
Category:
Microbiology
Get More
Subject Mock Tests
Practice with over 200,000 questions from various medical subjects and improve your knowledge.
Attempt a mock test nowMock Exam
Take an exam with 100 random questions selected from all subjects to test your knowledge.
Coming SoonGet More
Subject Mock Tests
Try practicing mock tests with over 200,000 questions from various medical subjects.
Attempt a mock test now