A polymer substrate functionalized with a functionality comprising at least one cyclic, metal ion coordinating ligand group which comprises at least 3 nitrogen donor atoms in the ring of the cyclic group, at least one of the nitrogen atoms having an optionally substituted carboxy(lower alkyl) or optionally substituted phosphono(lower alkyl) group covalently attached thereto, is well suited for use in conjunction with “hard” metal ions of low toxicity (such as Ca
2+
, Mg
2+
or Fe
3+
) in the separation/purification of appropriately “tagged” polypeptides by Immobilized Metal ion Affinity Chromatography (IMAC).
一种聚合物基底,其功能化包括至少一个环状
金属离子配位
配体基团,该基团在环状结构中至少包含3个氮供体原子,其中至少一个氮原子具有可选择性取代的
羧酸(较低烷基)或可选择性取代的
膦酸(较低烷基)基团共价连接,非常适合与低毒性的“硬”
金属离子(例如Ca2+,Mg2+或Fe3+)一起在固定
金属离子亲和层析(IMAC)中用于分离/纯化适当“标记”的
多肽。