Derivatized oligonucleotides (ODNs) are coupled to a solid support in improved yield resulting in a high density of coupled oligonucleotide per surface unit of the support, through a Schiff base type bond formed between an NH2 group attached either to the solid support or to the ODN and an aromatic aldehyde attached to the other of the solid support and the ODN. The preferred solid support-ODN conjugate is formed between semicarbazide groups attached to a glass surface and an aromatic aldehyde attached at either 3′, or 5′ end of an ODN or to an intermediate nucleotide of the ODN.
富集寡核苷酸(ODNs)通过一种席夫碱型键与固体支撑物耦合,使耦合寡核苷酸在支撑物表面单位上的密度增加,从而提高产量。其中,NH2基团连接到固体支撑物或ODN上,芳香醛基团连接到另一方的固体支撑物或ODN上,形成键合。首选的固体支撑物-ODN结合物是在
玻璃表面上连接的半羧酰
肼基团与连接在ODN的3'端、5'端或ODN的中间核苷酸上的芳香醛基团之间形成的。