http://digfir-published.macmillanusa.com/lodish_animation/a0305_sds_gel_electro.htmlChapter 3. SDS Gel Electrophoresis
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http://digfir-published.macmillanusa.com/lodish_animation/a0305_sds_gel_electro_dlap.xmlDLAP questions519bca41b11c0f136800004c