An improved chemical probe for the detection of the amino acid citrulline combines: 1) a reactive head formed of 1,3-dicarbonyl moiety that reacts with a citrulline side chain in an improved manner compared to currently used 1,2-dicarbonyl moieties; and 2) a modular action of the probe where citrulline side chains are labeled first using reactive heads described above, and attachment of a read-out subunit or tag, be it a fluorophore, a nanoparticle, or an antigen is performed separately. The modular nature of the chemical probe increases the sensitivity of the probes due to their smaller size. Additionally, the chemical probes of the present disclosure allow the same sample to be analyzed using a variety of read-out methods.
一种改进的
化学探针用于检测
氨基酸琥珀酰
氨基丙
氨酸,结合了以下特点:1)由1,3-二酮基团形成的反应性头部,与琥珀酰
氨基丙
氨酸侧链相比目前使用的1,2-二酮基团有更好的反应性;2)探针的模块化作用,其中首先使用上述描述的反应性头部标记琥珀酰
氨基丙
氨酸侧链,然后单独进行读出亚基或标记物的连接,无论是荧光物质、纳米颗粒还是抗原。
化学探针的模块化特性增加了探针的灵敏度,因为它们体积更小。此外,本公开的
化学探针允许使用各种读出方法分析同一样本。