Application of epsilon-polylysine in preparation of microsphere sealing agent and microsphere sealing agent

The invention discloses an application of epsilon-polylysine in preparation of a microsphere sealing agent and the microsphere sealing agent, and the microsphere sealing agent comprises the following components: epsilon-polylysine, a preservative and a buffer solution. Epsilon-polylysine is used as a microsphere sealing agent, and the epsilon-polylysine is relatively stable to heat and pH, so that the thermal stability of the microsphere sealing agent can be remarkably improved, and the difference between a background and a signal value is small, the consistency is good, and the microsphere sealing agent is obviously superior to a conventional microsphere sealing agent; the microsphere sealing agent provided by the invention can seal non-specific sites on the surfaces of microspheres, reduce the background, solve the problem of competitive inhibition interference or structural change, and improve the storage stability of microspheres coated antibodies. 本发明公开了一种ε-聚赖氨酸在制备微球封闭剂中的应用及微球封闭剂，微球封闭剂，包括以下组分：ε-聚赖氨酸、防腐剂及