Article Abstract:
Maynard V. Olson will be awarded the 1992 Genetics Society of America medal for his significant contributions in the field of genetics. Olsen started out as an inorganic chemist, but later settled on genetics while working on the cloning and sequencing of the tyrosine tRNA genes in yeast. He made other significant contributions in yeast molecular genetics, not the least of which was the development of pulsed field gel electrophoresis. More than anyone, Maynard madefruitful the convergence of genetic and physical mapping. Maynard has recently taken up the study of physical mapping of the human genome.
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Article Abstract:
Systematic mutation of surface residues in yeast actin gene was analyzed by isolating and characterizing site directed mutations in the gene. The mutations were done by replacing codons for charged residues with that coding for alanine. Two mutations apparently codes for a dominant defective protein, 11 for lethal but recessive phenotypes and 16 for recessive conditional lethal traits. Seven mutations were found to code for ambiguous phenotypes. The mutant genes yields proteins readily comparable to actin.
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Article Abstract:
Ronald W. Davis is the recipient of the 1998 Genetics Society of America Medal, acknowledging his contributions to the field of modern genetics through his studies on the development of genetic technologies. Davis utilizes electron microscopes to analyze the structure of individual DNA molecules. He discovered the cohesive property of DNA ends generated by EcoRI endonuclease. In addition, Davis was instrumental in the development of bacteriophage recombinant libraries.
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