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Updated: Jun 29, 2026
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An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
Published on: November 3, 2010
Un gradiente de conversión de genes meiotic opuesto a la dirección de la transcripción
R E Malone1, S Bullard, S Lundquist
1Department of Biology, University of Iowa, Iowa City 52242.
Nature
|September 10, 1992
Resumen
La conversión génica en Saccharomyces cerevisiae muestra polaridad, con frecuencias más altas en el extremo 3' del gen HIS2. Esto sugiere que los sitios de iniciación de la recombinación meiotica no se encuentran en el gen.
Área de la Ciencia:
- Biología Molecular Biología Molecular
- Genética La genética.
- Genética de la levadura Genética de la levadura
Sus antecedentes:
- La recombinación genética incluye el cruce y la conversión de genes (segregación aberrante).
- La conversión de genes en la levadura (Saccharomyces cerevisiae) da como resultado segregaciones de esporas no mendelianas 3:1 o 1:3.
- La conversión de genes exhibe polaridad, un gradiente en la frecuencia a través de un gen.
Objetivo del estudio:
- Para investigar la polaridad de la conversión génica para el gen HIS2 en Saccharomyces cerevisiae.
- Para determinar la ubicación de los sitios de iniciación de la recombinación meiotic basada en la polaridad de conversión.
Principales métodos:
- Análisis de los patrones de segregación de esporas en Saccharomyces cerevisiae.
- Mapeo de los gradientes de frecuencia de conversión de genes a través del gen HIS2.
Principales resultados:
- El gen HIS2 muestra un gradiente de polaridad para la conversión génica.
- La mayor frecuencia de conversión génica se observa en el extremo 3' del gen HIS2.
Conclusiones:
- La polaridad observada sugiere que los sitios de iniciación de la recombinación meiotica se encuentran en el extremo 3' del gen HIS2.
- La región promotora del gen HIS2 no es el sitio de iniciación para la recombinación meiotica.
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