title: Structural data on chicken IgA and failure to identify the IgA of the tortoise.
mesh_terms: D000818:Animals; D000918:Antibody Specificity; D002645:Chickens / Q000276:immunology*; D005455:Fluorescent Antibody Technique; D007122:Immunoelectrophoresis; D007070:Immunoglobulin A / Q000302:isolation & purification; D007413:Intestinal Mucosa / Q000276:immunology / Q000648:ultrastructure; D010802:Phylogeny; D014426:Turtles / Q000276:immunology*
chemical_list: D007070:Immunoglobulin A