Are plasmids with more than 1 2micron circles stable in yeast? I was
subcloning into pRS424 and some of my miniscreens, in addition to having
my insert, also have concatamers of pRS424. I transformed them into
yeast and the gene seems to be expressed but I'm worried about the yeast
rearranging the plasmids to get rid of the extra 2micron circles.