Highly Sensitive and Selective Biosensor for a Disaccharide Based on an AraC-Like Transcriptional Regulator Transduced with Bioluminescence Resonance Energy Transfer.

复杂介质中单个糖的准确定量通常依赖HPLC分离，而乳糖酶处理乳品中痕量乳糖的测定尤为困难，因为需在约140 mM葡萄糖和半乳糖存在下检测痕量乳糖。现有偶联酶生物传感器灵敏度低、生化步骤复杂且耗时。本文提出基于直接分子识别的光子转换策略，筛选出对乳糖高度特异的产气荚膜梭菌（Clostridium perfringens）BgaR转录调...