Avian immunoglobulin structure

Class (size in kDa) (size in kDa) (size in kDa) (%) Location which studied 

A further division is into allotypes, which have smaller differences from one another and represent alternative forms. These are the result of allelic differences in the constant regions of the heavy chain genes. For example, in the domestic fowl, 14 allotypes of IgG-1 and five of the IgM-1 subclasses have been defined (Ch ng Benedict, 1981), and some of these 

Domestic fowl IgY Adult, 5-6 Egg-yolk, 8 First expressed in bursa at E16 

Domestic fowl IgM 1.7-2.6 Bile, 0.28 Egg-white, 0.15 First expressed in bursa at E13 

Domestic fowl IgA 0.3-5 Bile, 3.2 Saliva, 0.09 Tears, 0.15 Egg-white, 0.7 First expressed in bursa at E18 

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