The results from enzyme-linked assay and dot blot experiment show that an enrichment pool was obtained after four rounds selection, which can specifically be used to recognize ricin.

• 酶联免疫和斑点杂交实验结果表明，仅经4轮筛选即可获得特异识别蓖麻毒素蛋白的寡核苷酸适配子。