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In chemistry, an amino acid is a molecule containing both amine and carboxyl functional groups. These molecules are particularly important in biochemistry, where this term refers to alpha-amino acids with the general formula H2NCHRCOOH, where R is an organic substituent. In the alpha amino acids, the amino and carboxylate groups are attached to the same carbon atom, which is called the α–carbon. The various alpha amino acids differ in which side chain (R group) is attached to their alpha carbon. They can vary in size from just a hydrogen atom in glycine through a methyl group in alanine to a large heterocyclic group in tryptophan. Amino acids are critical to life, and have a variety of roles in metabolism. One particularly important function is as the building blocks of proteins, which are linear chains of amino acids. Amino acids are also important in many other biological molecules, such as forming parts of coenzymes, as in S-adenosylmethionine, or as precursors for the biosynthesis of molecules such as heme. Due to this central role in biochemistry, amino acids are very important in nutrition. Amino acids are commonly used in food technology and industry. For example, monosodium glutamate is a common flavor enhancer that gives foods the taste called umami. Beyond the amino acids that are found in all forms of life, amino acids are also used in industry. Applications include the production of biodegradable plastics, drugs and chiral catalysts. From Wikipedia under the
GNU Free Documentation License  ebi.ac.uk 183px x 197px | 11.90kB [source page] Small molecules amino acids These can be the building blocks of the macromolecules or they can have independent roles such as signal  birrs.net 160px x 81px | 3.40kB [source page] Discontinued Select a Book About Sports Supplements  instruments.ingos.cz 163px x 159px | 6.40kB [source page] Amino acid analyzer From Yahoo Image Search: "Amino acid"  elements4health.com unknown ue, 07 Jul 2009 18:13:50 GM According to researchers, consuming an . amino acid. commonly found in vegetable protein could be associated with lower blood pressure.  genome.cshlp.org Kumar, S., Suleski, MP, Markov, GJ, Lawrence, S., Marco, A., Filipski, AJ ue, 07 Jul 2009 07:00:00 GM Successful prediction of known disease-associated mutations (DAMs) is much higher for evolutionarily conserved positions and for original mutant . amino acid. pairs that are rarely seen among species. Prediction accuracies for nSNPs show ...  achieveperfecthealth.com admin Fri, 24 Jul 2009 23:10:29 GM Acai is wrapped and packed full of antioxidants, . amino acids. and essential fatty . acids. . Although acai may not be found in your local supermarket, you can find it in certain health food and gourmet stores (maybe in juice form). ... From Google Blog Search: "Amino acid"  news.google.com Market Wire (press release) The enzyme breaks down the amino acid tryptophan and it is associated with damage to brain cells. Findings show a significant association between activation ... and more » news.google.com PR Web (press release) (press release) Liquid MORPH+ combines 45 grams of three high-quality types of protein (whey, casein, and hydrolyzed collagenic for a complete amino acid profile)--along ... and more » news.google.com Examiner.com Devotees of asparagus know their urine may carry an odor caused from the amino acid asparagines, and the odor lasts briefly. More good news! ... and more » From Google News Search: "Amino acid" How to draw the structural formula to amino acid peptide? Q. I'm confused by what my microbiology teacher wants me to do with the following problem: "Consider the following peptide: lysine-valine-threonine- cysteine-leucine-proline- gluamine-glutamic acid-aspartic acid-tryptophan, with lysine as the amino-terminal acid and tryptophan as the carboxy-terminal amino acid in the peptide. Draw out the complete structural formula of the peptide and determine the overall ionic charge on the peptide at pH 7.0. Charge at acid pHs? Charge at alkaline pHs?" Can someone help me figure out how to draw this structure and figure out the ionic charges? Asked by CF - Tue Oct 9 04:04:38 2007 - - 4 Answers - 0 Comments A. From the above link, you can check the structures of all your amino acids. You will see that for all your amino acids, there is an amino terminal (this is your -NH2) and your carboxylic terminal (-COOH). In peptide bonds, the amino terminal of one amino acid (it becomes =NH3+) is bonded to the carboxylic end of your next amino acid (which becomes -COO-). When you say that lysine is your amino terminal acid, this means that the -NH2 of lysine is free and is not bonded to another amino acid. it is the carboxylic end of lysine that is bonded to the amino terminal of your next amino acid, valine. Then valine's carboxylic end is connected to the amino end of threonine...so on and so forth...That is why your tryptophan is your carboxy-term [cont.] Answered by gorgeousgoddess - Tue Oct 9 04:29:31 2007 Which amino acid of the pair listed would you expect to disrupt protien structure the most? Explain? Q. Which amino acid of the pair listed would you expect to disrupt protien structure the most? Explain a. Val replaced with Ala or Phe. b. Lys replaced with Asp or Arg. c. Pro replaced with His or Gly. Asked by bio_chem - Wed Feb 13 23:51:50 2008 - - 5 Answers - 0 Comments A. Have you ever had a day where you read something *completely* wrong? Well, this was it. I'm sorry for what was written a few minutes ago. I've hit the 'edit' link, and I'm starting all over again --- with something that I'm being more careful with this time. a) Phenylalanine, being aromatic compared to the alkane-like chains of Val and Ala, would disrupt more. b) Lys has a chain length must more similar to Arg than Asp, so Asp would disrupt more. c) Pro is a rigid molecule. It has a cyclical component that most closely ressembles His. Therefore, Gly, a flexible, short-chained amino acid, would disrupt more. Okay... now *that* makes more sense, right? Sorry about that. It's late. Answered by N H L - Thu Feb 14 00:02:36 2008 What amino acid is coded for in the following DNA sequence CAT?
Q. and if there is a genetic mistake during replication and the sequence is CAG what amino acid would that be? Asked by me Vale MADRE - Thu Sep 18 16:31:47 2008 - - 1 Answers - 0 Comments A. You can look at a codon table. Here use this website: Answered by sci219 - Thu Sep 18 16:36:31 2008 From Yahoo Answer Search: "Amino acid" |
