Various methods for altering surface characteristics of a microsphere are provided. One method includes coupling an enolic acid to the microsphere to modify the surface characteristics of the microsphere. The surface characteristics may include charge density and/or pKa. A reagent can be coupled to the microsphere via the enolic acid. The reagent may include a biomolecule. The modified surface characteristics may increase a stability of the reagent when the reagent is coupled to the microsphere. The modified surface characteristics may also improve performance of an assay carried out with the microsphere. Another embodiment relates to a microsphere that includes an enolic acid coupled to a polymer core of the microsphere such that the enolic acid modifies surface characteristics of the microsphere. A reagent can be coupled to the microsphere via the enolic acid.
提供了改变微球表面特性的各种方法。其中一种方法包括将烯醇酸偶联到微球上,以修改微球的表面特性。表面特性可能包括电荷密度和/或pKa。可以通过烯醇酸将试剂偶联到微球上。试剂可能包括
生物分子。修改后的表面特性可能在试剂与微球偶联时增加试剂的稳定性。修改后的表面特性还可能改善使用微球进行的检测的性能。另一种实施方式涉及包括偶联到微球聚合物核心的烯醇酸的微球,使得烯醇酸修改微球的表面特性。试剂可以通过烯醇酸偶联到微球上。