Cleavage

cleavage
division of a zygote into cells known as blastomeres
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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Cleavage
[Anglo-Saxon cleofian - to cut, divide]. The process of cell division in the zygote to form a multicellular embryo.
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complete cleavage - major pattern of embryonic cell divison in which cytokinesis completely separates cells during division; it is typically seen in smaller eggs containing moderate (mesolecithal) to sparse (isolecithal) yolk.
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Cleavage is the first step in development of ALL multicelled organisms. Cleavage converts a single-celled zygote into a multicelled embryo by mitosis. Usually, the zygotic cytoplasm is divided among the newly formed cells.
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Cleavage
Patterning
Differentiation
Growth
Cleavage
Mitosis and cytokinesis of the zygote, an unusually large cell, produces an increasing number of smaller cells, each with an exact copy of the genome present in the zygote.
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cleavage furrow
The first sign of cleavage in an animal cell; a shallow groove in the cell surface near the old metaphase plate.
cline ...
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cleavage
The process of cytokinesis in animal cells, characterized by pinching of the plasma membrane; also, the succession of rapid cell divisions without growth during early embryonic development that converts the zygote into a ball of cells.
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cleavage The early mitotic and cytoplasmic divisions of an embryo.
Cleido- Key, clavicle.
climacteric rise A point during the ripening process of certain fruit when the respiration rates rise to very high levels.
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RNA cleavage is needed to process tandem repeats produced by rolling circle RNA replication
FactsRNA cleavage.
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Sites of cleavage
Rather than cutting DNA indiscriminately, a restiction enzyme cuts only double-helical segments that contain a particular nucleotide sequence, ...
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Sites of cleavage
Rather than cutting DNA indiscriminately, a restriction enzyme cuts only double-helical segments that contain a particular nucleotide sequence, ...
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discoidal cleavage - incomplete division of the blastodisc, a region of yolk-free, active cytoplasm; characteristic of birds, fishes and reptiles.
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The specific cleavage of a downstream flap has been employed as an extremely sensitive, quantitative, and highly specific assay for the detection of target DNA both alone and in mixture of extraneous DNA.
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Restriction
The cleavage of double-stranded DNA by an endonuclease (restriction enzyme). The restriction enzyme distinguishes between self and foreign DNA based upon the modification of its DNA-binding site (for example, by methylation).
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by Sanger, DNA is synthesized in vitro in such a way that it is radioactively labeled and the reaction terminates specifically at the position corresponding to a given base; the "chemical" method, ssDNA is subjected to several chemical cleavage ...
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A reaction in which a molecule of water is added at the site of cleavage of a molecule to two products. I Immortalizing oncogene. A gene that upon transfection enables a primary cell to grow indefinitely in culture.
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phosphorolysis Cleavage of a compound with phosphate as the attacking group: analogous to hydrolysis. phosphorylation Formation of a phosphate derivative of a biomolecule, most often by enzymatic transfer of a phosphate group from ATP.
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The roles of different proteolytic enzymes in this process can be determined from the sites of cleavage in the aggrecan core protein, which generates novel termini (neoepitopes).
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One of the most common of these cleavages is the removal of specific signal peptides. These peptides target proteins for transport to a particular cellular organelle in a process known as protein sorting.
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It is also unique among model organisms in that cleavage occurs in a syncytium.
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RESTRICTION ENDONUCLEASE - A bacterial enzyme which recognizes a specific palindromic sequence (recognition sequence) within a double-stranded DNA molecule and then catalyzes the cleavage of both strands at that site. Also called a restriction enzyme.
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Cytokinesis (division of the cytoplasm) begins in anaphase. A cleavage furrow forms as actin filaments underneath the plasma membrane constrict in a band called the contractile ring. Two cells will be produced as this process continues.
Telophase ...
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restriction map - diagrammatic representation of a DNA molecule indicating the sites of cleavage by various restriction enzymes ...
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Restriction fragment length polymorphisms (RFLP) are variation in DNA fragment banding patterns of electrophoresed restriction digests of DNA from different individuals of a species. Often due to the presence of a restriction enzyme cleavage site at ...
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Restriction enzymes : An endonuclease enzyme, isolated from bacteria, that recognizes specific base-pair sequences within DNA and causes endonucleolytic cleavage of the DNA at a site determined by the recognized DNA sequences.
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Post-translational processing: The reactions which alter a protein's covalent structure, such as phosphorylation, glycosylation or proteolytic cleavage.
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