Yeast artificial chromosome (YAC)
A yeast mini-chromosome used for cloning. It has telomeres, a centromere and an autonomous replication sequence (ARS). DNA fragments of 200-500 kb can be cloned using YAC vector.
Other Resources ...
yeast RNase
(Science: enzyme) An enzyme catalyzing the exonucleolytic cleavage of rNA to yield 3'-phosphomononucleotides.
Synonym: rNase U4.
Originating from a bacterial plasmid; a YAC contains additionally a yeast centromeric region (CEN); a yeast origin of DNA replication (ARS); and two telomere regions (TEL). YACs are capable of cloning very large pieces of DNA.
Yeast Artificial Chromosome (YAC)
Yeast artificial chromosome (YAC) is a human-engineered DNA molecule used to clone DNA sequences in yeast cells. YACs are often used in connection with the mapping and sequencing of genomes.
Budding yeast can live with either two genomes (diploid) or one (haploid). In either case, it reproduces by forming buds (hence the name) by mitosis.
Recently, a novel mode of inheritance has been described in the yeast Saccharomyces cervisiae.
Yeast Genome Directory
Published as a separate supplement to the May 29th issue of Nature, the Yeast Genome Directory contains papers on the sequence of all unpublished Saccharomyces cerevisiae chromosomes (IV, V, VII, IX, XII, XIII, XIV, XV, ...
Yeast cell size regulation
The relationship between cell size and cell division has been extensively studied in yeast. For some cells, there is a mechanism by which cell division is not initiated until a cell has reached a certain size.
Yeast
A unicellular form of fungi. Some fungi (for example Saccharomyces cerevisiae) are only known to reproduce as yeast while other fungi (for example, Candida albicans) are dimorphic, ...
yeast
A unicellular fungus that lives in liquid or moist habitats, primarily reproducing asexually by simple cell division or by budding of a parent cell.
yolk ...
Yeast
Yeast produce alcohol which accumulates in their environment. As the concentration of alcohol in their environment increases, it becomes more and more toxic to them.
yeast - Translations of Yeast (Saccharomyces cerevisiae) genomic CDS (coding sequences).
ecoli - Translations of Escherichia coli genomic CDS (coding sequences).
YAC, Yeast Artificial Chromosome A cloning vector based on a the essential components of a yeast chromosome. It provides two telomeres, two selectable markers and an origin of replication.
[edit] Yeast Heterochromatin
Saccharomyces cerevisiae, or budding yeast, is a model eukaryote and its heterochromatin has been defined thoroughly. Although most of its genome can be characterized as euchromatin, S.
[edit] Yeast ATP synthase
Yeast ATP synthase is the most complex known and is made of 20 different types of subunits.
[edit] Evolution of ATP synthase ...
Yeasts
Term used to describe the morphological appearance of fungi which are eucaryotic, chemoheterothropic microorganisms with cell walls containing chitin, cellulose or both. They may be unicellular or multicellular. (See also moulds).
yeasts One of several species of ascomycete fungi in which an extensive mycelium is not produced, so that the oganism is usually unicellular.
yellow fever Virus disease transmitted by the mosquito Aedes aegypti.
yeast - eukaryotic organisms larger than most bacteria, commonly divides by budding ...
Yeast is that way; our work with yeast involves very simple tools. Petri dishes that we grow them on and toothpicks that we isolate them with and pieces of velvet that we replicate the colonies from one plate to another.
YAC: Yeast artificial chromosome. This is a method for cloning very large fragments of DNA.
YAC
See yeast artificial chromosome.
Related Terms:
Yeast artificial chromosome (YAC) ...
The term yeast is widely applied to ususally single-celled ascomycetes such as Candida albicans and Saccharomyces cerevisiae (sold as brewer's yeast or baker's yeast).
A collection of cells, usually bacteria or yeast, that have been transformed with recombinant vectors carrying DNA inserts from a single species. (See cDNA library, Expression library, Genomic library.) Ligase (DNA ligase).
Yeast artificial chromosomes (YACs) are the most commonly used form.
Auxotrophic mutantA bacterial strain which has a mutation in at least one of the enzymes in a biochemical pathway responsible for synthesising an essential substance, ...
Common fungi are mushrooms, molds, and yeast. Yeast commonly grow as single cells and are useful in the production of wines, beers, and bread.
Besides bacterial plasmids, some other cloning vectors include viruses, bacteria artificial chromosomes (BACs), and yeast artificial chromosomes (YACs).
Fungi are almost entirely multicellular (with yeast, Saccharomyces cerviseae, being a prominent unicellular fungus), heterotrophic (deriving their energy from another organism, whether alive or dead), ...
They founded a yeast culture and maintained it for many generations. Occasionally, a mutation would arise that allowed its bearer to reproduce better than its contemporaries. These mutant strains would crowd out the formerly dominant strains.
Yeast is used to make several types of food for humans. We need yeast to make breads. We also use them to make alcohol. It's a whole process called fermentation. Sugars are broken down in an environment without oxygen.
YAC See yeast artificial chromosome.
Yeast artificial chromosome (YAC) A vector used to clone DNA fragments (up to 400 kb); it is constructed from the telomeric, centromeric, ...
In this sequence of microscope images, an amoeboid human neutrophil senses, moves toward and ingests an ovoid yeast.
Most evidence for such a link thus far has come from studies with yeast cells, some of which suggest that cumulative damage to ribosomal RNA genes and fragmentation of the nucleolus may be central to the aging process.
Ethanol an alcohol made (when yeast ferments sugar) from the 2-carbon hydrocarbon‚ ethane‚ CH3CH2OH‚ present in beverages such as beer and wine and added to some brands of automobile fuel
(ether = upper air) ...
cloning vector - intentionally designed artificial DNA construct used by molecular biologists to amplify selected pieces of DNA inserted into the construct; examples include plasmid, phage, phagemid, cosmid, fosmid, yeast artificial chromosome ...
ARS: Autonomously replicating sequence. ARS is the origin of replication in yeast.
Artificial selection: Selective evolutionary pressure imposed by humans to obtain breeds with certain features (such as breeding cows, dogs, chicken).
Inactivation of specific genes, knockouts are often created in laboratory organisms (such as yeast or mice) so that scientists can study the knockout organism as a model for a particular disease. [Talking Glossary]
Leukemia ...
Model system (or Model organism) A cell type or simple organism-such as a bacterium, yeast, plant, fruit fly, or mouse-used to answer basic questions about biology.
Mutation (myoo-TAY-shun) A change in a DNA sequence.
Microscopic movie of macrophages
ingesting a yeast (567 kb)
Adaptive immune response ...
It codes for only a small but essential part of the mitochondrial proteins and for genes for tRNAs and rRNAs. In animals and yeast every species has a uniform type, in plants it varies even within one cell.
Related Terms: ...
Fungus, Fungi (pl.): Any of numerous plants lacking chlorophyll, ranging in form from a single cell to a body of branched filaments. Includes the yeasts, molds, smuts, and mushrooms.
For example, what is learned about the physiology of yeast cell can also apply to human cells. The field of animal physiology extends the tools and methods of human physiology to non-human animal species.
of asexual reproduction common in some lower animal groups in which part of the body wall bulges outward and eventually forms a new individual, which becomes detached from the parent. Budding can also occur in single-celled organisms such as yeast.
fungi - all non-chlorophyll-bearing thallophytes (i.e., all non-chlorophyll-bearing plants of a lower order than mosses and liverworts) that often show mycelial, spreading growth, e.g., rusts, mildews, molds and yeasts (Glossary of PM) ...
There are individuals that are constituted by only one cell, for example bacteria, protists and some fungi (for example yeasts and molds); however, although in quantity and/or volume a multicellular organism possesses more matter, ...
Glycosylation is a property of eukaryotic cells, and differs among different cell types (i.e., it may be very different in yeast or insect cells used for protein expression, when compared with Chinese hamster ovary (CHO) cells).
YAC -- yeast artificial chromosome; a linear vector into which a large fragment of DNA can be inserted; the development of YAC's in 1987 has increased the number of nucleotides which can be cloned.
 See also: Organ, Human, DNA, Trans, Cell
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