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 NH
2
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.
衍生寡核苷酸(ODNs)经过衍生化后,通过NH2基固定在固体支撑物上或ODN上,并与固体支撑物或ODN上的芳香醛形成席夫碱型键,从而在改进的收率下与固体支撑物耦合,导致每个表面单位的支撑物上耦合的寡核苷酸密度较高。首选的固体支撑物-ODN共轭物是在
玻璃表面上连接有半
胍基团的芳香醛连接到ODN的3'端、5'端或ODN的中间核苷酸上形成的。