Gel retardation assay result: 12-ACSs/plasmid could combine with antisense ECE when pH value was below 7, but completely incombine at pH=8;

• 凝胶阻滞实验结果:12-烷基化壳聚糖纳米粒在pH7以下均能很好地与反义内皮素转换酶核酸结合,但是在pH为8时,显示结合不完全;