ANTIBODY

Antibody are the proteins with two long heavy chains and two light or short chains.

The antibody belong to the family of proteins known as immunoglobulin 

Antibody are of five types 

1- IgA - It has dimer structure . It is about 10-15percent in serum antibodies .

It is present in tears ,saliva ,intestine ,milk ,blood and lymph.

Function - It gives protection to mucosal surfaces and provides immunity to infant digestive tract .

2- IgM- It has pentamer  structure . It is about 5-10 percent in serum antibody .

It is present in blood, lymph ,beta cell surface .

It is first antibody produce during infection .

Function - It is effective against  microbes and egg lutinating antigens .

3- IgG-It has monomer structure .It is about 80 percent in serum antibody .

It is present blood, lymph  and intestine .

 It is transferred from mother to foetus through placenta .

Function - It enhances phgaytosis ,neutralizes  toxins and viruses ,protects foetus new born . 

4- IgD - It has monomer structure . It is about 0-2percent in serum antibody .

It is present in beta cell surfaces ,blood and lymph .

Function - create uncertain 

5- IgE - It has monomer structure . It is about 0.002 percent in serum antibody .

It is found attached to most cells and basophils through body ,blood .

Function - It helps to stimulates allergic reaction and lysis of worms.