申请人:Eli Lilly and Company
公开号:US05439829A1
公开(公告)日:1995-08-08
A chelating agent is covalently bonded to a biologically active molecule such as an enzyme or antibody, the biologically active molecule is contacted with a support containing a bound transition metal ion whereby the metal ion is chelated by the chelating agent and the oxidation state of the metal ion is changed by treatment with an oxidizing or a reducing agent to provide a kinetically inert: oxidation state to immobilize the biologically active molecule on the support. The transition metal ion is preferably Co(II), Cr(II) or Ru(III) and the oxidation state of the metal ion is changed to Co(III), Cr(III) or Ru(II), respectively. The chelating agent can be iminodiacetic acid, nitrilotriacetic acid, terpyridine, bipyridine, triethylenetetraamine, biethylenetriamine, 1,4,7-triazacyclonane or a chelating peptide. Certain chelating agents can immobilize more than one biologically active molecule at a metal ion site on the support. The immobilized biologically active molecules can be used in affinity chromatography or in assay systems.
螯合剂与生物活性分子(如酶或抗体)共价键合,将生物活性分子与含有结合过渡金属离子的支持物接触,从而使金属离子被螯合剂螯合,并通过氧化或还原剂的处理改变金属离子的氧化态,以提供一个动力学上惰性的氧化态,以将生物活性分子固定在支持物上。 过渡金属离子最好是Co(II),Cr(II)或Ru(III),分别将金属离子的氧化态改变为Co(III),Cr(III)或Ru(II)。 螯合剂可以是亚胺二乙酸,硝基三乙酸,三吡啶,二吡啶,三乙烯四胺,二乙烯三胺,1,4,7-三氮杂环庚烷或螯合肽。 某些螯合剂可以将多个生物活性分子固定在支持物上的金属离子位点上。 固定的生物活性分子可以用于亲和色谱或测定系统中。