The invention provides methods for isolating a target molecule from a sample. In an embodiment, the method involves contacting a sample with a capture agent, the agent comprising a siderophore and a transition metal cation, under conditions wherein the agent is capable of binding a target molecule to form a target molecule-capture agent complex, wherein the target molecule is selected from the group consisting of a phosphorylated molecule, a nitrotyrosine-containing molecule and a sulfated molecule, and separating the target molecule-capture agent complex from the sample, thereby isolating the target molecule from the sample. Also provided are methods for determining the presence of a target molecule in a sample, that involve contacting a sample with a capture agent, the agent comprising a siderophore and a transition metal cation.
本发明提供了从样品中分离目标分子的方法。在一个实施方案中,该方法包括将样品与捕获剂接触,捕获剂包括苷元和过渡
金属阳离子,捕获剂能够结合目标分子形成目标分子-捕获剂复合物,其中目标分子选自由
磷酸化分子、含硝基
酪氨酸分子和
硫酸化分子组成的组,然后将目标分子-捕获剂复合物从样品中分离出来,从而从样品中分离出目标分子。此外,还提供了用于确定样品中是否存在目标分子的方法,该方法涉及将样品与捕获剂接触,捕获剂包括苷元和过渡
金属阳离子。