site

Zoology

...rsity Web, the complete collection; or search the site . This site proffers a tremendous wealth of information organ ized phylogenetically. Full article >>&...

Z-DNA

... Chromatin regions near the transcription start site frequently contain DNA sequence motif s favourable for forming Z-DNA . Likewise, formation of Z-DNA near the promoter region stimulates transcription . Full article >>>...

Yolk

... that supports embryo nic development; the first site of blood cell s and circulatory system function. Z ... Full article >>> yolk sac - the first of four extraembryonic membranes of amniotes to form during embryo genesis. Like the allantois , it arises from the splanchnopleure ...

X-ray diffraction

...; a more recent example, the calmodulin binding site in calcineurin (Fig. 1) was shown by Klee to be extremely sensitive to protease digestion and thus to be a disordered ensemble; this disorderliness was confirmed in Kissingers X-ray diffraction ... Full article >>> Watson and Cric...

X chromosome

...mosome : Autosome ratio greater than unity. This site is dependent on visitors like you. If you think you can add more to this definition or see a correction that needs to be made, click on the EDIT button below and fix it. Full article >>> the second X chromosome is inactivated to a ...

Wild-type

...icular mutation ( wild-type at that locus or site , denoted by a plus sign). Cis ... Full article >>> In second instar wild-type wing discs, wg is express ed distal ly in a wedge of anterior ventral cells (Couso et al. 1993; Williams et al. 1993; Ng et al. 1996) Wingless is d...

VNTR

...number-of-tandem- repeats ( VNTR ) locus . This site is dependent on visitors like you. If you think you can add more to this definition or see a correction that needs to be made, click on the EDIT button below and fix it. Full article >>> DNA sequence s that are present in many copies...

Vesicle

... Locus (plural = loci ). A specific location or site on a chromosome . Log phase. See Logarithmic phase. Full article >>> liposomes - synthetic bilayer in the form of a spherical vesicle membrane potential - voltage difference across a membrane due to a slight excess of positive io...

Vectors

...ng vector consisting of the phage lambda cos site insert ed into a plasmid . Such vectors can be package d into lambda phage or maintained as plasmid s. Cosmid s are often used to clone large DNA fragments (up to about 40 kilobase s). Full article >>> A derivation of Co...

Variety

...omplex developmental processes. Flynome reference site on the stories behind the naming of many fly genes. Full article >>> Mutants: On Genetic Variety and the Human Body Armand Marie Leroi; Hardcover; Buy New: $17.65 38. Molecular Cloning : A Laboratory Manual (3-Volume Set) Joseph ...

Variation

... and a trans- acting hin gene , which encodes a site -specific recombinase , called an invertase. Ful...cle >>> Genetic variation s at the site where a restriction enzyme cuts a piece of DNA . Such variation s affect the size of the result...

Vagina

...;> vagina The tubular organ that is the site of sperm deposition and also serves as the birth canal. PICTURE vascular bundle Groups of xylem , phloem and cambium cells in stems of plant s descended from the procambium embryo nic tissue layer. Full article >>> Vagin...

Vacuoles

... PICTURE vagina The tubular organ that is the site of sperm deposition and also serves as the birth canal. PICTURE ... Full article >>> coenocytic -- Condition in which an organ ism consists of filamentous cells with large central vacuoles , and whose nuclei are not partitioned ...

Vacuole

... PICTURE vagina The tubular organ that is the site of sperm deposition and also serves as the birth canal. PICTURE ... Full article >>> vacuole A membrane-bounded, fluid-filled space in a cell . vagabond's disease Darkened, thickened skin caused by years of infestation with body ...

Uterus

...ntation of the embryo in the oviduct or other site outside the uterus typically caused by failure of zona pellucida to keep blastocyst from adhering to oviduct walls; ... Full article >>> Ascending infection from the vagina or cervix to the uterus , fallopian tubes and ...

Urinary bladder

... article >>> urinary bladder : the site where waste products are shipped from the kidney for storage or for release. urine : the product of the kidney ; a watery solution of waste products, salts, organ ic compound s, uric acid , and urea . Full article >>> small i...

Uric acid

... nucleic acid breakdown. urinary bladder : the site where waste products are shipped from the kidney for storage or for release. Full article >>> Dec 4, 1863 Barbit uric acid is discovered by German researcher Adolf von Baeyer. His discovery came on the day of St. Barbara, so he cho...

Upstream

...m A sequence located in front of a particular site relative to the direction of transcription and ...ated in the 5' direction relative to a particular site ). Full article >>> Upstream The region extending in the 5' direction from a gene ...

Untranslated RNA

... RNA . Upstream activator sequence : A binding site for transcription factor s, generally part of a promoter region. Full article >>> (Rougeulle et al., 2003) The centre contains twelve genes, seven of which code for proteins , five for untranslated RNA s, of which only two are ...

Umbilical cord

...sists in respiration , and in addition it is the site of storage of nitrogenous wastes. In eutherian mammals , it forms the vessels of the umbilical cord and ... Full article >>>...

Turgor

...her data bases too Definition of turgor : This site is dependent on visitors like you. If you think you can add more to this definition or see a correction that needs to be made, click on the EDIT button below and fix it. Full article >>> Turgor (also called turgor pressure or osmo...

Transversion

... A mutation that can be mapped to one specific site within a locus . A small mutation that consists of the replacement ( transition or transversion ); addition; or deletion ( frameshift ) of one or a few bases . Full article >>> Since transition mutation s ( purine to pur...

Transposition

... promoter for transposase and the DNA target site of the transposase . Copy number control is exercised by the level of the outward transcript . Full article >>> Transposition al recombination Another form of site-specific recombination , transposition al recombination do...

Transposon

...atalyzes insertion of the transposon at a new site . Full article >>> Transposon (Tn...er genes enable those elements to move from one site on a chromosome to another. Full article >>> Transposon tag Use of a transposon...

Transposase

.... a sequence of DNA that makes up the target site . Full article >>> Transposase C...epare insertion by cutting at the integration site . Gene ... Full article >>> Transposase An enzyme (or enzyme complex) requir...

Transposable element

...DNA sequence s that can move from one chromosomal site to another. Trisomy Possessing three copies of a particular chromosome instead of the normal two copies. See also: cell , gene , gene expression , chromosome ... Full article >>> Group of transposable element s that were de...

Transport protein

... . Changes in the conformation move the binding site to the opposite side of the protein . Full article >>> A transport protein in the plasma membrane s of a plant or animal cell that specifically facilitates the diffusion of water across the membrane ( osmosis ). aqueous so...

Translocation

...DNA sequence s that can move from one chromosomal site to another. Full article >>> Translocation : The process by which a newly synthesized protein is directed toward a specific cellular compartment (i.e, the nucleus , the endoplasmic reticulum ). Full article >>> Pr...

Translation

...A/GCCATGG) for mammalian translation initiation site . For species -specific translation initiation sequence s, please visit Primo. Other Resources ... Full article >>> Translation ( genetics ) (Redirected from Translation ( biology )) Translation is the second process of prot...

Transfer RNA

...to a growing polypeptide chain at the ribosomal site of protein synthesis during translation . Full article >>> Transfer RNA . Small RNA molecule s that carry amino acids to the ribosome for polymerization into a polypeptide . Full article >>> Transfer RNA (...

Transcription unit

... The sequence from the transcription al start site to the site of termination, inclusive of introns . transcription al control The regulation of the rate of a ...

Transcription start site

Transcription start site The basal promoter An Analogy Hormones exe...n Start Site (TSS) Approximately -35 A binding site for RNA polymerase ... Full article >>> Transcription start site Site within a...

Transcription factor

... at a specific promoter or enhancer region or site , where it regulates transcription . Full articl...served DNA sequence found about 75 bp 5' to the site of transcription in eukaryotic genes. Its specific ( trans- acting) transcription factor is CTF...

Transcription

...tream from the 5' end of a transcription start site that acts as the binding site for RNA polymerase . A region of DNA to which RNA polymerase binds in order to initiate tra...

Transcript

...tream from the 5' end of a transcript ion start site that acts as the binding site for RNA polymerase . A region of DNA to which RNA polymerase binds in order to initiate tr...

Trans

...a , either the electron trans port system or the site of photosynthetic energy metabolism is located ...ane. The ribosomes of the prokaryotes are the site of protein synthesis. Full article >>> The inner fluid phase has most of the enzy...

Trait

...icular gene on several different trait s. This site is dependent on visitors like you. If you think you can add more to this definition or see a correction that needs to be made, click on the EDIT button below and fix it. Full article >>> character -- Heritable trait possessed by a...

Thylakoids

...make up the grana in chloroplasts ; the actual site of photosynthesis within chloroplasts . thymosins: hormones secreted by the thymus gland that influence the development of the T lymphocytes of the immune system . Full article >>> thylakoids - flattened sac of membrane in...

Thylakoid

...make up the grana in chloroplasts ; the actual site of photosynthesis within chloroplasts . thymosins: hormones secreted by the thymus gland that influence the development of the T lymphocytes of the immune system . Full article >>> thylakoid membrane A saclike photosynthet...

Thrombocytes

...make up the grana in chloroplasts ; the actual site of photosynthesis within chloroplasts . Full article >>> thrombocytes platelets . thromboxanes A class of molecule s derived from arachidonate and involved in platelet aggregation during blood clotting . Thromboxanes have a ...

Tetrad

..., or sometimes is just c-jun dimer s. The AP-1 site consensus sequence is (C/G) TGACT(C/A) A. Also known as the TPA- response element (TRE). (TPA is a phorbol ester, tetrad ecanoyl ... Full article >>>...

Testes

...thin the scrotum that store sperm and are the site of their final maturation (epi = upon over; didym = testes ) ... Full article >>>...

Terminator

AKA: terminator , Rho-independent termination site A sequence in DNA that signals termination of... Full article >>> Terminator The site on a DNA sequence at which transcription and DNA replication stops. Cf. origin . Full artic...

TATA box

...quence 25 to 30 base pair s upstream from the site for transcription in many but not all genes; binding site for general factors involved in initiation of transcription . In prokaryotes the analogous is ca...

Synapsis

... terminal ending of a neuron and the receptor site of the postsynaptic cell . Full article >>> = Synapsis . The conjugation or fusion of homologous chromosomes during prophase of the first meiotic division , when crossing over occurs. Normally syndesis starts at the telomer...

Suppression

...s an example of regulation by differential splice site suppression . Full article >>>...

Substrate

...trans fer of a re action product from the active site of one enzyme directly to the active site of a different enzyme , where it serves as a substrate . Full article >>> Edaphic ...

Stroma

... matrix between the grana in chloroplasts and site of the dark reactions of photosynthesis . Full article >>> A normalized, subtracted (against a stroma l cell cDNA library ) cDNA library was generated from these cells . A similar strategy was adopted in the construction of a ...

Stop codon

...inclusion of an intron . Mutation of a splice site reducing specificity. Full article >>> of representing candidate solutions in a robust way does not arise in nature, because the method of representation used by evolution , namely the genetic code , is inherently robust: with only ...

Stomata

...the yield of photosynthesis , because the active site of rubisco accepts O2 in place of CO2 and generates no ATP . This usually occurs on hot, dry days when stomata are closed and the O2 concentration in the leaf exceeds that of ... Full article >>> trans piration Passage of water ...

Stoma

...ure of the Human Genome Project Information Web site . Full article >>> ( Amby stoma mexicanum ): Literally meaning water monster (in Aztec), axolotl is a salamander (amphibian) extensively used in the evolution ary immunogenetic studies. Full article >>> Retinobla stoma...

Sticky ends

... Transposase makes a staggered cut at the target site producing sticky ends , cuts out the transposon and ligates it into the target site . Full article >>> Fragments of DNA that has been cut with restriction enzymes ha...

Sticky end

... Transposase makes a staggered cut at the target site producing sticky end s , cuts out the transposon and ligates it into the target site . Full article >>> Fragments of DNA that has been cut with restriction enzymes ha...

Stalk

...f F1 causing the 3 catalytic nucleotide binding site s to go through a series of conformation al changes ... Full article >>> At least one fish has its luminescent organ located at the tip of a protruding stalk and uses it as bait to lure prey within reach of its jaws. Full article...

Spirochetes

...rochetes : rigid spiral bacteria . spleen : the site where red blood cells are destroyed; a reserve blood supply for the body. stamen : the structure of a flower that contains a thin, stemlike filament and an anther . Full article >>> Spirochetes These are thin, corkscrew-shaped...

Spirilla

...rochetes : rigid spiral bacteria . spleen : the site where red blood cells are destroyed; a reserve blood supply for the body. Full article >>> bacilli : rod-shaped cocci : spherical spirilla : curved walls ability to form spore s method of energy production ( glycolysis for ...

Spleen

...s . Full article >>> spleen : the site where red blood cells are destroyed; a reserve blood supply for the body. stamen : the structure of a flower that contains a thin, stemlike filament and an anther . Full article >>> spleen An organ that produces lymphocytes...

Spindle Fibers

...e the kinetochore is assembled. Thus, it is the site where spindle fibers of the mitotic spindle a...;>> the structure located at a specific site on the chromosome that holds the two chromatid s together; it is the site of attachment for th...

Species

...A/GCCATGG) for mammalian translation initiation site . For species -specific translation initiation sequence s, please visit Primo. Other Resources PubMed Google ... Full article >>> Restriction fragment length polymorphisms ( RFLP ) are variation in DNA fragment banding patt...

SnRNP

...ndem repeat polymorphism STS sequence -tagged site ... Full article >>> Short RNA transcript s of 100-300 bp that associate with proteins to form small nuclear ribonucleo protein particles ( snRNP s), which participate in RNA processing . (See RNA .) snRNA . See Small nucl...