Why is my miniprep plasmid not yielding any plasmid DNA when visualizing using agarose-gel electrophoresis?

I performed plasmid isolation from Agrobacterium rhizogenes strain LB 510 and 072001, but no yield has been seen from electrophoresis. I'm using Fermentas Gene Jet Miniprep 50 and bacterial strain...

20 July 2012 7,836 7 View