1 Gustincich S,Carninci P,Schneider C.A rapid method to extrat high-quality genomic DNA from yeast.Tech nique-AJ Methods Cell Mol Biol,1991,3:76. 2 Restrepo BI,Barbour AG.Cloning of 18S and 25S rDNAs from the pathogenic fungus Cryptococcus neoformans.J Bact eriol,1989,171:5596. 3 Varma A,Kwon-Chung KJ.Rapid method to extract DNA from Crytococcus neoformans.J Clin Microbiol,1991,29 :810.