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In a screen designed to isolate human cDNAs that complement a yeast G2 phase checkpoint mutation (mec1), we isolated a cDNA homologous to the Saccharomyces cerevisiae CDC34 gene. The human CDC34 cDNA can functionally substitute for the yeast CDC34 gene and represents a mammalian homolog of the group of yeast genes required for the late G1-->S phase transition. The human CDC34 gene is expressed in multiple cell lines as a unique species and Southern blot analysis reveals evidence for a single gene that is highly conserved in higher eukaryotes. The human gene is located on the far telomeric region of 19p13.3 in a location that defines a region of homology between human chromosome 19p and mouse chromosome 11.
Plon et al. (Mon,) studied this question.