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Cleavage

Definition

noun

(1) A division or separation of form.

(2) (cell biology) The act or state of splitting or dividing of a cell, particularly during the telophase of (animal) cell division.

(3) (embryology) The repeated division of a fertilized ovum, producing a cluster of cells with the same size as the original zygote. . (4) (chemistry) The splitting of a large or complex molecule into smaller or simpler molecules.


Supplement

In embryology, cleavage is the first stage of embryogenesis. It pertains to the repeated mitotic division of a zygote into blastomeres that cluster to a compact mass called morula. Cleavage continues until blastula is formed. The various types of cleavage are:


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Protostomes and Deuterostomes

... will be the mouth first in protostomes, and the anus first in deuterostomes. There are other differences as well. Google the patterns of cleavage each does (spiral in protostomes and radial in deuterostomes). Hope that helps!

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by plasmodesmata11
Mon Feb 23, 2009 12:16 am
 
Forum: Zoology Discussion
Topic: Protostomes and Deuterostomes
Replies: 4
Views: 1390

IMMUNOLOGY HELP!PLEASE!

... heavy and 2 different light chains 2 different heavy and 2 different light chains I think it is 2 identical heavy and 2 indentical light? 2) Cleavage of IgG by papain produces which of the following: A Fab fragment Monovalent antigen binding fragments Isolated heavy chains F(ab')2 Isolated ...

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by pinkypig
Thu Feb 05, 2009 5:12 pm
 
Forum: General Discussion
Topic: IMMUNOLOGY HELP!PLEASE!
Replies: 0
Views: 412

Question regarding Restriction Enzymes

... to answer some questions from past exam papers. One of the questions presented is shown below: A restriction fragment produced by Bgl II cleavage of Wulfruna wanderensis DNA is cloned into the Bam HI site in pATHB1. When attempting to recover this important piece of DNA from the plasmid ...

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by Methtical
Fri Dec 19, 2008 2:01 pm
 
Forum: Genetics
Topic: Question regarding Restriction Enzymes
Replies: 5
Views: 1579

My undergraduate thesis project - Lactose metabolism

... is converted into glucose either via Leloir pathway like in E.coli or tagatose pathway like in lactobacilli. So, if the end product of lactose cleavage is glucose, then why doesn't the bacteria ferment it like what E.coli does (because I also compared it with E.coli)? My hypothesis is that ...

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by victor
Tue Nov 04, 2008 3:10 pm
 
Forum: Microbiology
Topic: My undergraduate thesis project - Lactose metabolism
Replies: 2
Views: 911

Glycolysis + Glycogen

Well, glycogen phosphorylase catalyzes the cleavage of a glucose from glycogen by inorganic phosphate, resulting in the formation of glucose-1-phosphate WITHOUT needing an ATP... does that help?

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by Wingnut
Tue Aug 05, 2008 8:02 pm
 
Forum: Cell Biology
Topic: Glycolysis + Glycogen
Replies: 10
Views: 2017
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