IgG - 75% 7S MW IgM 5-7% 19S

IgD, IgE each 1%

allergic conditions

Ig

IgA 15% - 7S

found in secretions

Deficiency IgA - most

common

primary immunodeficiency

associated upper respiratory,

GI infections.

Autoimmune disease.

Ab infectious organism

cold agglutinins

ABO

RF

K/L = 2/1

2 heavy chains 50, 000 dal

2 light chains 20,000 dal

K

L

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