IUBio

plasmid instability

Wolfgang Fecke wf14 at columbia.edu
Wed Jan 11 14:40:32 EST 1995


Hi,

I am new in the yeast field and have just a silly problem. I have 
transformed a leu2-3,112, his3-11,15 strain with a replicating plasmid 
containing a HIS-reporter gene and a LEU-marker. I have got only very few 
colonies (4), compared with a control plasmid without the HIS-gene which 
gave several hundred colonies. I have transformed with the same amount of 
DNA. Is the HIS-plasmid not stable in this strain, or could it be 
integrated in the HIS or LEU locus ?

Thanks in advance for your help !

	:-) Wolfgang
 



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