ends

Tubulin

...e. Tubulin binds GTP and assembles onto the (+) ends of microtubules in the GTP-bound state. Once assembled into microtubules, it hydrolyzes GTP into GDP. The GDP-bound form of tubulin will disassemble from the tip of a microtubule, though it will not spontaneously fall out of the middle. This GTP c...

Mitosis

...crotubules), the centrioles push apart to opposite ends of the cell nucleus. It should be noted that many ...omes to which they are attached) apart to opposite ends of the cell. These two stages are sometimes called 'early' and 'late' anaphase. At the end of anaph...

Ribosome

.... The mRNA begins with a start codon ( AUG ) and ends with a stop codon ( UAG ). In Figure 3, both ribosomal subunits ( small and large ) assemble at the start codon (the 5' end of the mRNA). The ribosome uses tRNA (transfer RNAs which are RNA molecules that carry an amino acid and present the ma...

Restriction enzyme

... genes can be spliced together, provided their ends are complementary (more below). Many of the proced...ightly staggered incisions, resulting in " sticky ends ", out of which one strand protrudes. There are three known evolutionary lineages of restriction en...

Protein

...to be the active, or native conformation. The two ends of the amino acid chain are referred to as the carboxy terminus (C-terminus) and the amino terminus (N-terminus) based on the nature of the free group on each extremity. Protein Data Bank (PDB) Main article: Protein Data Bank The struct...

Proteasome

...for protein digestion, and has openings at the two ends to allow entry of the targeted protein. 26S proteasome The 26 S proteasome is used for the digestion of ubiquitin -marked proteins. It is located on both sides of a cell's nuclear membrane and consists of a 20S core protease particle and two 19...

Prophase

...crotubules), the centrioles push apart to opposite ends of the cell nucleus. See also prometaphase metaphase anaphase telephase...

Natural selection

...w different from what they formerly were. Darwin ends his book with an often quoted passage: "There is a grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gr...

Morphogenesis

... microtubules and are concentrated at the anterior ends of forming Drosophila eggs. Nanos mRNAs also a...cytoskeleton but they concentrate at the posterior ends of the eggs. Hunchback and caudal mRNAs lack special location control systems and are fairly eve...

Mitotic spindle

...nsists of a bundle of microtubules joined at the ends but spread out in the middle, vaguely resembling a...gned with sister chromatids pointing to opposite ends of the spindle, the sister chromatids separate and are dragged away from each other, ensuring that...

Mitosis

...crotubules), the centrioles push apart to opposite ends of the cell nucleus. It should be noted that many ...omes to which they are attached) apart to opposite ends of the cell. These two stages are sometimes called 'early' and 'late' anaphase. At the end of anaph...

Actin

...s usually bound to two separate filaments and both ends simultaneously walk towards their filament's plus end, sliding the actin filaments over each other. This results in the shorterning, or contraction, of the actin bundle (but not the filament). This mechanism is responsible for muscle contraction an...

Meiosis

...n completed at the time of ovulation (meiosis II ends only just after fertilization ). Oocytes that are... Telophase The first meiotic division effectively ends when the centromeres arrive at the poles. Each daughter cell now has half the number of chromosomes ...

Lung

...passages known as parabronchi, connected at either ends by the dorsobronchi and ventrobronchi. Air flows through the honeycombed walls of the parabronchi and into air capillaries, where oxygen and carbon-dioxide are traded with cross-flowing blood capillaries by diffusion, a process of crosscurrent exchan...

Human

...etuses while they remain in the uterus. Human life ends with the individual's death . Compared with that in other species, human childbirth is relatively complicated. Painful labors lasting up to twenty-four hours or more are not uncommon, and may result in injury to the child or the death of the mo...

Flagellum

...ctly attached to the plasma membrane. The filament ends with a capping protein. The bacterial flagellum ...teria have a single flagellum each on two opposite ends (only one end's flagellum operates at a time, allowing the bacteria to reverse course rapidly by swi...

Morphogenesis

... microtubules and are concentrated at the anterior ends of forming Drosophila eggs. Nanos mRNAs also a...cytoskeleton but they concentrate at the posterior ends of the eggs. Hunchback and caudal mRNAs lack special location control systems and are fairly eve...

DNA

...difficult to separate. Circular DNA When the ends of a piece of double-helical DNA are joined so tha..., people who work with DNA refer to the asymmetric ends of each strand as the 5' and 3' ends (pronounced "five prime" and "three prime"). DNA worker...

Bioinformatics

...A fragments (each about 600 nucleotides long). The ends of these fragments overlap and, aligned in the right way, make up the complete genome. Shotgun sequencing yields sequence data quickly, but the task to re-align the fragments can be quite complicated for larger genomes. In the case of the Human Geno...

Chromosome

...ne or two arms projecting from the centromere. The ends of the chromosomes are special structures called ...s are attached at the centromere and two opposite ends of the cell. During mitosis, the microtubules pull the chromatids apart, so that each daughter cell ...

Bioinformatics

...A fragments (each about 600 nucleotides long). The ends of these fragments overlap and, aligned in the right way, make up the complete genome. Shotgun sequencing yields sequence data quickly, but the task to re-align the fragments can be quite complicated for larger genomes. In the case of the Human Geno...

Sticky end/blunt end

... then be covalently bonded by DNA ligase . Blunt ends may be ligated, but the reaction is significantly slower. These terms are most commonly used to describe the product of a restriction enzyme digestion of DNA....

Apoptosis

...roliferate; but, in the absence of Shh, one of the ends of this same Ptc1 receptor (the carboxyl-terminal, inside the membrane) is cleaved by caspase-3, an action that exposes an apoptosis-producing domain (see the Perspective by Isabel Guerrero and Ariel Ruiz i Altaba and the research report by Chantal T...

Anaphase

...tid moves to opposite poles of the cell (opposite ends of the nuclear spindle ). Anaphase is preceded by metaphase , by the end of which fully condensed sister chromatids are arranged in pairs, their centromeres lying along a surface known as the metaphase plate. Spindle fibres (microtubules containing...

Affinity chromatography

...ags (six Histidine residues added to one or both ends of a protein) and GST (glutathione-S-transferase) tags. Six His tags have an affinity for nickel ions which are covalently bound to NTA for the purposes of solid medium entrapment [ [1] ]. For elution purposes a nickel chelating agent is used....

Actin

...s usually bound to two separate filaments and both ends simultaneously walk towards their filament's plus end, sliding the actin filaments over each other. This results in the shorterning, or contraction, of the actin bundle (but not the filament). This mechanism is responsible for muscle contraction an...