Abstract

Homology between the coding regions of the chicken and yeast glyceraldehyde 3-phosphate dehydrogenase (GAPDH) genes was directly demonstrated by the hybridization of cDNA clone coding for GAPDH in the chicken with EcoRI-digested yeast DNA. A yeast EcoRI fragment library in bacteriophage λ was screened using the chichen cDNA plasmid as probe, and two recombinant phages were isolated, each one containing a different GAPDH gene. The initiation and termination sites for the GAPDH mRNA were localized for the two different GAPDH genes and compared to those of other yeast genes. Measurements of the relative mRNA levels for the two genes show both genes are transcribed at about the same level when yeast are grown on glucose media.

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