There is a company that sells a Frozen-EZ Yeast Transformation kit.
625 W. Katella Ave., Suite 32
Orange, CA 92667
Phone (714) 288-9682
Fax (714) 288-9643
E-mail zymo at kaiwan.com
We have used this kit and have had good results. Use only 1/5 of the volumes they recommend and plate the whole transformation. One microliter of an E. coli miniprep can give one hundred colonies.
Jeff Simon Oregon Health Sciences University, Portland, OR
simonj at ohsu.edu