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·PÁ´£¤Î! §ÚŪ±zªº¹L±b¤@ÂIÂI·í«e©M¦Ò¼{¡C§Ú¨Ã¥B¬O¬Û¹ï¦a·s«Ø¹ïEMSAs ¥@¬É¦ý§Ú°µ¤F¤½¥¿ªº¦ì¤¸¶}±¸¦b©P³ò¬°¸ê°T, ¥[¤W¦³À°§Ut²ü±q³oÓ½×¾Â- ±z¬O¦b¥¿½Tªº¦w±Æ ±z¯à¹Á¸Õªº´X¥ó·Qªk©M¨Æ: 1)Could ¬O, ±zªºlysate ¿@«×¬O¤Ó°ª? ±z°µ¤Fµ}ÄÀ¨t¦C¾î¸ó½d³ò¶Ü? §Úµo²{§@¬°´ú¶Z¾¹, lysate ªº1:10 ªº10 Ó½d¨Òµ}ÄÀ¨t¦C±q¾ã¼äȱo¹Á¸Õ¡C 2)You ¤£´£¤Î¬O§_±z¹B¸ü³o¦b«ÇÁ{®É©Î¦bcoldroom ¡C¦pªG±z°µ¡¼³o¦b room temp, then try mixing the DNA and protein in the coldroom and also running the gel at that temperature. 3)The fact that you have some complex being retained in the wells is a bit strange. Could you be precipitating your protein when complex formation occurs? Have a look at your binding buffer components and make sure that the pH and ionic components are ok? I don't know the make up of your binding buffer but I've included mine here for reference. (25mM HEPES-KOH [pH7.9], 0.1mM EDTA, 5mM MgCl2, 50mM KCl, 1mM DTT, 20% (w/v) glycerol, 0.2mM PMSF, and 1ul protease inhibitor cocktail containing 1.6ug poly (dI-dC) . (dI-dC) (Sigma) Hope this helps... Keep posting...we'll get you through this... Canalba, UK |
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