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Second messenger

second messenger

(Science: molecular biology) In many hormone sensitive systems the systemic hormone does not enter the target cell but binds to a receptor and indirectly affects the production of another molecule within the cell, this diffuses intracellularly to the target enzymes or intracellular receptor to produce the response. This intracellular mediator is called the second messenger.

Examples include cyclic AMP, cyclic GMP, iP3 and diacylglycerol.


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The initiating Ca 2+ ion

... a subchapter under signaling on pathways that involve Calcium as a second messenger

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by MrMistery
Wed Jul 01, 2009 1:46 am
 
Forum: Cell Biology
Topic: The initiating Ca 2+ ion
Replies: 3
Views: 139

Re: Any SOLID arguments against evolution?

... enzymatically! That means just to get the plans for the hemoglobin enzymes are involved in sync with the RNA polymerase to produce a COMPLEMENTARY messenger RNA. How many amino acids are in the DNA and RNA for the hemoglobin? How many amino acids are in the enzymes which transcribe the mRNA? 2. ...

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by AFJ
Wed Jun 03, 2009 12:15 am
 
Forum: Evolution
Topic: Any SOLID arguments against evolution?
Replies: 106
Views: 16656

Re: HELP ME PLEASEEE - DNA Sequences

mRNA is a messenger RNA (Ribous Nucleic Acid) molecule, it defers from DNA by being much less stable and having the base Uracil instead of Thymine . mRNA is created inside the nucleus of the cell during the process of TRANSCRITION, ...

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by bekbaev
Wed May 13, 2009 2:54 am
 
Forum: Human Biology
Topic: HELP ME PLEASEEE - DNA Sequences
Replies: 1
Views: 999

Central Dogma of Molecular Biology

... José. I am a Puerto Rican man, born here in Puerto Rico. English is my second language; my first is Spanish. Now, my first discussion and question. ... and the conversion of mRNA to the protein is translation. Besides messenger RNA (mRNA) , there is also ribosomal RNA (rRNA) and transfer RNA ...

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by JosePR
Sat Apr 25, 2009 8:53 pm
 
Forum: Molecular Biology
Topic: Central Dogma of Molecular Biology
Replies: 3
Views: 1060

How does a cell know how big it is?

... Feedback loops seem logical... This is based on that when you culture something in a petri dish, it will stop growing, like e. coli. The chemical messenger that tells cells that there is no room and they need to stop dividing, in this case, is cAMP. Based on that, I would think that it is similar ...

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by plasmodesmata11
Mon Mar 02, 2009 2:41 pm
 
Forum: Cell Biology
Topic: How does a cell know how big it is?
Replies: 4
Views: 584
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