IgY (Immunoglobulin of Yolk) was the only immunoglobulin presented in egg yolk, which had several advantages compared to IgG which raised by mammalian.

• 鸡卵黄免疫球蛋白（Immunoglobulin of Yolk,简称IgY）是鸡卵黄中唯一的免疫球蛋白，在生产上具有哺乳动物IgG不可比拟的优势。