An objective of the present invention is to provide ionic polymers that can provide for polymer-comprising substrates whose surfaces can stably and easily immobilize ligands such as sugar chains interacting with biological substances, in which the ligand portion exists stably even in water or buffer, and its detection capability does not decrease for a long period of time; and substrates comprising the polymers. The ionic polymer of this invention comprises two or more ionic functional groups (A) and two or more biointeracting groups represented by formula L-X-B- [wherein, L denotes a ligand capable of interacting with a biological substance, X denotes a spacer, and B denotes a binding group] as side chains covalently bound to a main chain polymer.
本发明的目的是提供一种离子聚合物,该聚合物可提供由聚合物组成的基底,其表面可稳定、轻松地固定与
生物物质相互作用的
配体(如糖链),其中
配体部分即使在
水中或缓冲液中也可稳定存在,且其检测能力在很长一段时间内不会降低;以及由该聚合物组成的基底。本发明的离子聚合物包括两个或两个以上的离子官能团(A)和两个或两个以上由式 L-X-B- 表示的
生物相互作用基团[其中,L 表示能与
生物物质相互作用的
配体,X 表示间隔物,B 表示结合基团],作为侧链与主链聚合物共价结合。