Reference: Spitzer SG and Spitzer ED (1997) Isolation of Cryptococcus neoformans chromosome-specific probes using expressed sequence tags. J Med Vet Mycol 35(4):257-61

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Abstract


Clinical and environmental isolates of Cryptococcus neoformans exhibit a high degree of karyotypic variability. Analysis of the molecular basis of karyotypic differences requires a large set of chromosome-specific probes. We have determined the chromosomal distribution of a set of randomly selected C. neoformans cDNA clones and have explored the feasibility of identifying these clones through partial DNA sequencing. Forty-four randomly selected cDNA clones were labelled and hybridized to PFGE blots of C. neoformans. Expressed sequence tags were generated by sequencing the 5'-end of each clone. Thirty-five clones hybridized to single bands on PFGE blots. At least seven chromosomes were recognized by these probes. Homology searches identified potential homologs of several groups of proteins not previously studied in C. neoformans. PFGE hybridization and sequencing of random cDNA clones is an efficient method for identifying chromosomal-specific probes in fungi that lack extensive sets of genetic markers.

Reference Type
Journal Article | Research Support, U.S. Gov't, P.H.S.
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Spitzer SG, Spitzer ED
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