The spacer arms were succinylated by succinic acid, then activited by N-hydroxysuccinimide in the presence of 1 -ethyl-3-(3-dimethylaminopmpyl) carbodiimide (EDAC), and finally bonded deoxyribonucleic acid (DNA) ligand.

• 此间隔臂用丁二酸进行丁二酰化，并在1－乙基－3－（3－二甲基氨丙基）碳化二胺（EDAC）的存在下用N－羟基丁二酰亚胺（NHS）活化，最后与配位体脱氧核糖核酸（DNA）键合，并用紫外分光光度法测定了配位体容量。