20bpladder60次
dna marker/dna ladder/dna 分子量标准物
super dna ladder由10条dna片段组成,分别为10000bp,5000bp,3000bp
核小体是染色体的基本结构单位,由组蛋白八聚体和180～200bp核小体dna
mini sizer 50bp dna ladder11200100 loads25 - 650 bp50 bp dna
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