wat are immunoglobins?

Question

i hv got to submit an assignment on immunoglobins!!!my professor told us to gather sum information from the internet......i will be grateful if sum1 can help me in doin my home work....lol!!!

Answer 1

Immunoglobins

Introduction:

An immunoglobin is a specific protein called an antibody synthesized in response to the presence of a foreign substance (antigen). The antibody has a specific molecular structure capable of recognizing a complementary molecular structure on the antigen which might be some proteins, polysaccharides, and nucleic acids. Small organic foreign molecules do not by themselves elicit antibody formation unless they become bonded to one of the larger biomolecules listed above.

Structure: See graphic on left.

Studies have shown that immunoglobin G (IgG), the most common human immunoglobin, consists of two long "heavy" chains (A and B) and two short "light" chains (C and D). These are in the shape of a Y bonded together with disulfide bonds.

There are several major areas of globular tertiary structure on the chains. The globular structure on the ends of the chains may be variable and accounts for some of the differences in specificity for different antigens. There are also two carbohydrate chains in between the A and B chains.

There are several types of immunoglobins where the composition and structure is slightly different, but still maintains the Y shape. IgG - major serum immunoglobin (antibody).
Ig M - first antibody produced in response to an infection.
IgA - protects body surfaces, mucous membranes, oral cavity.
IgD - thought to regulate antibody synthesis.
IgE - found in larger amounts in people with allergies


you can go to this website, it explains it really good.

http://www.elmhurst.edu/~chm/vchembook/568immunoglobins.html

Answer 2

I know a very little level .the immunoglobins present in our bloodcells,esp in white blood cells. It wre react in some virus and bacteria .
WBCs based on some enzymes.....