Secreted immunoglobulins have two separable functions: one is to bind specifically to pathogenic molecules, the other is to recruit cells and molecules to destroy the opsonized pathogen. IgY has a tetrameric structure consisting of two identical light chains (Mr = 24 kDa) and two identical heavy chains (Mr = 73 kDa).
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Warner A et al. CPNA-1, a copine domain protein, is located at integrin adhesion sites and is required for myofilament stability in Caenorhabditis elegans. Mol Biol Cell24:601-16 (2013).
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