Multivalent interaction and selectivities in selectin binding of functionalized gold colloids decorated with carbohydrate mimetics
摘要:
具有功能化有机外壳的胶体金颗粒被用作新型选择素粘合剂。配体外壳以不同的单环碳水化合物模拟物为末端,作为生物选择素配体中 sLex 单元的简化类似物。硫酸化选择素结合表位在金颗粒上的多价呈现使其对 L 选择素和 P 选择素具有极高的结合亲和力,IC50 值在亚纳摩尔范围内。根据硫酸化碳水化合物模拟物的环大小、取代模式及其构型,可获得对 L 选择素或 P 选择素的不同选择性。配体外壳中含有简单无环硫化醇、二醇和三醇的金颗粒则没有这些选择性。此外,还系统地研究了颗粒大小和疏水有机外壳厚度的影响。
The present invention relates to conjugates comprising an antibody, a detectable label, and a plurality of hydrazide thiol linkers. The present invention further relates to methods for detecting a target molecule in a cell or tissue sample, said methods using said conjugates.
A method is disclosed for making a conjugate of two molecules using a hydrazide thiol linker. In a particular working embodiment, an Fc-specific antibody-enzyme conjugate is made using the method and demonstrated to provide exceptional staining sensitivity and specificity in immunohistochemical and in situ hybridization assays.