'Natural antibodies' and immunoglobulins, a dilemma.
D000818:Animals; D004524:Eels; D005399:Fishes; D007136:Immunoglobulins / Q000032:analysis*; D007518:Isoantibodies / Q000032:analysis*; D012911:Snakes
D007136:Immunoglobulins; D007518:Isoantibodies