发展了基于荧光试剂8-氨基1,3,6-萘三磺酸二钠盐(ANTS)的糖基化蛋白质选择性标记和荧光检测的新方法.实验中以标准蛋白质细胞色素c和核糖核酸酶b为样品,优化了pH和反应时间.在优化的条件下,核糖核酸酶b的检测灵敏度可提高22倍,而非特异性的标记仅为1％,显示了这种衍生方法极好的选择性.进一步将该方法应用于卵清蛋白的衍生,通过结合二氧化钛(TiO2)亲和富集,共鉴定到14个蛋白质,其中超过85％的蛋白质具有一致的N-X-T/S(X为除脯氨酸以外的其他氨基酸)序列,为潜在的糖基化蛋白,进一步验证了该方法的高选择性.
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