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Background
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The basic structure of IgG molecule is composed of four polypeptide chains, that is, from the same two small molecular weight peptides (referred to as light chain,Light chain, L chain, the relative molecular mass of about 25,000) and two identical large molecular weight peptides (called heavy chain, heavy chain, H Chain, relative molecular mass of about 55,000) composed. A natural two heavy chains of IgG molecules are always the same. The goat IgG antibodies can specifically recognize the heavy Chain.
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