. Author manuscript; available in PMC: 2016 Nov 28.

Published in final edited form as: Dev Comp Immunol. 2016 Mar 16;64:150–166. doi: 10.1016/j.dci.2016.03.013

Table 2.

Main characteristics of immunoglobulins in rainbow trout.

	IgM	IgD	IgT
Concentration in serum	~0.6–3.3 mg/ml	~2–80 μg/ml	~4 μg
Concentration in gut mucus	~75 μg/ml	Not determined	~7 μg
Structure	Tetramer in serum (~700 kDa) and mucus (~800 kDa)	Long (~370–400 kDa) and short (~240 kDa) monomer	Monomer (~180 kDa) in serum, multimer in mucus (~4–5 monomers)
Demonstrated effector functions	Complement activation, opsonization, neutralization, immune exclusion	Not determined	Immune exclusion?
Coating of intestinal microbiota	Yes	Not determined	Yes
Pathogen-specific responses	Mainly detected in serum	Not determined	Mainly detected in mucus