Carbonaceous Chondrite

JMDMT #2606 Microfossils of Cyanobacteria in Carbonaceous Meteorites

Chemistry will tell you that an amino acid is any molecule that has both carboxylic acid and amino functional groups. They are the basic building units of a protein. In biochemistry, the shorter and more general term is used to refer to alpha amino acids. Those are amino acids wherein the amino and carboxylate functionalities are attached to a common carbon. Amino acids' residue is what's left of an amino acid once a water molecule has been lost in the formation of a peptide bond. Peptides are polymer chains which form the protien in our bodies.

Twenty amino acids will be encoded by the standard genetic code. These are called proteinogenic or standard Amino [http://www.allamino.com] acids. More complicated ones are produced by our bodies, and are called nonstandard (these are not as common). Proline is the only proteinogenic amino acid, whose side group links to the a-amino group and is cyclic. This forms a secondary amino group. Before, proline was called "imino", which was misleading and was changed. Protiens contain other amino acids which are usually formed by post-translational modification (modifications AFTER translation). These modifications are essential for the function of protein. At least two amino acids, other than the standard 20, are sometimes incorporated into proteins during the translation process.

Even though only 20 amino acids are genetically encoded, over one hundred have been found in nature. Some of these have been seen in meteorites, especially in a type called carbonaceous chondrites. Microorganisms and plants can often produce somewhat uncommon amino acids, which are located in peptidic antibiotics. Lanthionine is a sulfide-bridged alanine dimer found along with unsaturated amino acids in "lantibiotics", which are antibiotic peptides of microbial origin.

As well as protein synthesis, amino acids have some other biologically important jobs. Glycine, and glutamate, are used as neurotransmitters as well as standard amino acids in proteins. Many amino acids take on the role of synthesizing other molecules, such as tryptophan, which is a precursor of the neurotransmitter serotonin, and glycine, one of the few reactants in the synthesis of porphyrins such as heme. Heme is in "hemoglobin", which is also important in the makeup of protein. Numerous, non-standard amino acids, are biologically important: "GABA",another neurotransmitter, carnitine, which is used in lipid transport within the cell, citrulline, ornithine, hydroxyproline, hydroxylysine, homocysteine, and sarcosine.

Feel free to reprint this article as long as you keep the article, this caption and author biography in tact with all hyperlinks.

Tyler Brooker is the owner and operator of All Amino [http://www.allamino.com] - [http://www.allamino.com], which is the best site on the internet for all Amino related information.

The ____ meteorites are believed to have solidified in the cooling exterior of a large molten asteroid (which?

subsequently was broken apart.)
1. iron

2. chondrite

3. chondrule

4. achondrite stone

5. carbonaceous chondrite

Do a search on Wikipedia for each of the answers and your answer will be shown.^




273 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found
273 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found

$12.00
10d 19h 48m remaining

NWA 11203 Carbonaceous CK6 Chondrite G684 0039 013g w COA Rare 43 EVER
NWA 11203 Carbonaceous CK6 Chondrite G684 0039 013g w COA Rare 43 EVER

$0.99
4d 10h 58m remaining

Meteorite NWA 6870 Carbonaceous Chondrite CV3 Nice Chondrules 33 gram Slice
Meteorite NWA 6870 Carbonaceous Chondrite CV3 Nice Chondrules 33 gram Slice

$19.95
3d 16h 2m remaining

651 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found
651 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found

$4.00
11d 9h 4m remaining

341 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 as found fragment
341 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 as found fragment

$15.00
10d 19h 44m remaining

389 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found
389 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found

$22.00
10d 19h 44m remaining

small micro Tagish Lake Meteorite fragment Carbonaceous chondrite C2 ungrouped
small micro Tagish Lake Meteorite fragment Carbonaceous chondrite C2 ungrouped

$8.00
10d 19h 48m remaining

AMAZING CV3 UNCLASSIFIED CARBONACEOUS CHONDRITE METEORITE 714g
AMAZING CV3 UNCLASSIFIED CARBONACEOUS CHONDRITE METEORITE 714g

$49.00
6d 3h 33m remaining

Meteorite NWA 2140 Carbonaceous Chondrite CV3 Nice Chondrules 2 gram Slice
Meteorite NWA 2140 Carbonaceous Chondrite CV3 Nice Chondrules 2 gram Slice

$19.95
3d 15h 59m remaining

321 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found
321 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 nice as found

$20.00
10d 19h 44m remaining

Meteorite NWA 10448 Carbonaceous chondrite CV3 Full Slice
Meteorite NWA 10448 Carbonaceous chondrite CV3 Full Slice

$187.00
18d 13h 29m remaining

221 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 as found in Africa
221 grams NWA 4502 Meteorite Carbonaceous chondrite CV3 as found in Africa

$130.00
10d 19h 44m remaining



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