抗原与抗体的特异结合 ,主要是基于抗原和抗体分子结构及立体构型的互补 ,以及由多种因素造成二者分子间引力参与下发生的可逆性免疫反应。现行的固相免疫测定中 ,都是依据上述原理而设计 ,其与传统的“液相”血清学试验本质区别是有一个预先将抗原或抗体固相到载体表面的步骤 Antigen and antibody specific binding, mainly based on the antigen and antibody molecule structure and three-dimensional configuration of the complementary, and caused by a variety of factors between the two under the influence of molecular weight involved in the reversible immune response. Current solid-phase immunoassays are based on the above principles and are designed to differentiate from the traditional “liquid phase” serological test in that there is a step of pre-immobilizing the antigen or antibody to the surface of the support