Two-step activation of meiosis by the mat1 locus in Schizosaccharomyces pombe

Two-step activation of meiosis by the mat1 locus in Schizosaccharomyces pombe.

The mat1 locus is a key regulator of both conjugation and meiosis in the fission yeast Schizosaccharomyces pombe. Two alternative DNA segments of this locus, mat1-P and mat1-M, specify the haploid cell types (Plus and Minus). Each segment includes two genes: mat1-P includes mat1-Pc and mat1-Pm, while mat1-M includes mat1-Mc and mat1-Mm. The mat1-Pc and mat1-Mc genes are responsible for establis...

Allelic Complementation at the Adenylosuccinase Locus in Schizosaccharomyces Pombe.

OMPLEMENTATION between allelic mutants at the ad-4 (adenine-4) locus, deficient for the enzyme adenylosuccinase (adenylosuccinate AMP-lyase, C.E. 4322). was first reported in Neurospora (GILES, PARTRIDGE and NELSON 1957; WOODWARD, PARTRIDGE and GILES 1958). It was found that certain pairs of these mutants, which as a result of the absence of adenylosuccinase activity require adenine for growth,...

Conserved locus-specific silencing functions of Schizosaccharomyces pombe sir2+.

In Schizosaccharomyces pombe, three genes, sir2(+), hst2(+), and hst4(+), encode members of the Sir2 family of conserved NAD(+)-dependent protein deacetylases. The S. pombe sir2(+) gene encodes a nuclear protein that is not essential for viability or for resistance to treatment with UV or a microtubule-destabilizing agent. However, sir2(+) is essential for full transcriptional silencing of cent...

study of cohesive devices in the textbook of english for the students of apsychology by rastegarpour

this study investigates the cohesive devices used in the textbook of english for the students of psychology. the research questions and hypotheses in the present study are based on what frequency and distribution of grammatical and lexical cohesive devices are. then, to answer the questions all grammatical and lexical cohesive devices in reading comprehension passages from 6 units of 21units th...

[Schizosaccharomyces pombe].