• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Origins of Life - My George School
Origins of Life - My George School

... Requirements for the Formation of Life ...
Bone building: perfect protein
Bone building: perfect protein

... the code and synthesizing the OC on a ribosome. Firstly, the transcription (DNAmRNA) is regulated by 1,25dihydroxy-Vitamin D3, one reason that Vitamin D is so important for healthy bones. It is then first decoded (translated) as a preproosteocalcin, which is 98 amino acids long. This comprises thre ...
Collapse of Homochirality of Amino Acids in Proteins from Various
Collapse of Homochirality of Amino Acids in Proteins from Various

... showed that aA-crystallin containing large amounts of d-b-Asp may undergo abnormal aggregation to form massive and heterogeneous aggregates, leading to loss of its chaperone activity [23]. 4. Why Does Only Asp among All Amino Acids Spontaneously Racemize in Protein? – Racemization begins when the H- ...
Chapter 3 The Molecules of Cells
Chapter 3 The Molecules of Cells

...   The amino acid sequence of a polypeptide is programmed by a discrete unit of inheritance known as a gene.   Genes consist of DNA(deoxyribonucleic acid), a type of nucleic acid.   DNA is inherited from an organism s parents.   DNA provides directions for its own replication.   DNA programs a c ...
Chapter 25: Metabolism
Chapter 25: Metabolism

... tissues back to liver for storage or excretion in bile – Do not cause circulatory problems ...
Protein Synthesis
Protein Synthesis

... And third, in addition to the Adenine, Thymine, Guanine, and Cytocine nitrogen bases found in DNA, RNA nucleotides have a nitrogen base called Uracil, abbreviated as U. No Thymine (T) bases are found in RNA. Like Thymine in DNA, Uracil is complementary to adenine whenever RNA base pairs with another ...
the lecture in Powerpoint Format
the lecture in Powerpoint Format

... 3.11 Proteins are made from amino acids linked by peptide bonds  Proteins are – involved in nearly every dynamic function in your body and – very diverse, with tens of thousands of different proteins, each with a specific structure and function, in the human body. ...
15. The Importance of Energy Changes and Electron Transfer in
15. The Importance of Energy Changes and Electron Transfer in

... - Pyruvate dehydrogenase activated by phosphoprotein phosphatase ...
7.3 Translation (HL ONLY)
7.3 Translation (HL ONLY)

... Ribosomes are enzymes. The catalyse the translation of mRNA into a polypeptide. Their substrate is mRNA. Each ribosome can catalyse the transcription of different mRNA. ...
Function
Function

... In E. coli, shikimate kinase is an enzyme in the pathway of synthesis of chorismate from erythrose-4-phosphate chorismate is a branch compound for the synthesis of aromatic amino acids tryptophan synthetase pathway one of the best worked-out in E. coli, in terms of enzymology and regulation ...
L10v02a_-_glycolysis.stamped_doc
L10v02a_-_glycolysis.stamped_doc

... mitochondria for the citric acid cycle. [00:03:53.52] I'd like to look at a detail of step three in glycolysis. As you know, we invested two molecules of ATP. The first ones produces fructose 6-phosphate. At this point, the cell can still use this molecule for things other than glycolysis or it can ...
Global Properties of the Metabolic Map of
Global Properties of the Metabolic Map of

... The EcoCyc database characterizes the known network of Escherichia coli small-molecule metabolism. Here we present a computational analysis of the global properties of that network, which consists of 744 reactions that are catalyzed by 607 enzymes. The reactions are organized into 131 pathways. Of t ...
Function of prostaglandins
Function of prostaglandins

... linolenic acid (eicosapentaenoate precursor) are essential fatty acids, so they must be taken in the diet otherwise the body can not synthesize the eicosanoids. Minor ...
Over The Counter Medications (OTCs) NSAIDs
Over The Counter Medications (OTCs) NSAIDs

... Because nonprescription products may be used without any medical advice, making patients aware of time limits can be critical in ensuring their safety. ...
Trans Fatty Acids
Trans Fatty Acids

... • Fatty acids play many important roles in the cell – Intracellular signaling – Make up membrane that holds the cell together – Energy storage ...
Enzymes
Enzymes

... The figure is found at: http://stallion.abac.peachnet.edu/sm/kmccrae/BIOL2050/Ch1-13/JpegArt113/05jpeg/05_jpeg_HTML/index.htm (December 2006) ...
The Body`s Building Blocks
The Body`s Building Blocks

... What would be a poor-quality protein for a weanling would be very acceptable for an adult, says Ralston. The exception would be a lactating mare, which needs higher levels and higher-quality proteins (those with plenty of lysine) to produce milk. If she isn't getting enough, her milk production will ...
Metabolism of lipids
Metabolism of lipids

Extra slides (lecture Mon. 11/2)
Extra slides (lecture Mon. 11/2)

... • able to distinguish between natural and unnatural enantiomers of a molecule • able to introduce a new chiral center with enantiomeric specificity • important for ensuring the production and recognition of the correct biological molecules • a major advantage over most non-biological catalysts emplo ...
Slide 1
Slide 1

... represents over 500 different chemical intermediates and a greater number of enzymes. Virtually all organisms carry out the same basic set of metabolic pathways. Despite these large number of enzyme mediated reactions, they actually represent a highly integrated, and tightly regulated, process. We w ...
Enzymes
Enzymes

... If the pH becomes basic, the acidic amino acid side chains will lose H+ ions If the pH becomes acidic, the basic amino acid side chains will gain H+ ions Causes the ionic bonds, that help stabilize the tertiary structures of proteins, to break. Resulting in the denaturation of the enzyme. ...
Back-translation Using First Order Hidden Markov Models
Back-translation Using First Order Hidden Markov Models

Structure-Function Analysis of the UDP-N-acetyl-D
Structure-Function Analysis of the UDP-N-acetyl-D

... preferences (2, 4, 5). The structural basis for this enzyme specificity is unknown, as no experimental structure is currently available for ppGaNTases or for any other mammalian glycosyltransferase. Recently, several groups have identified an aspartate-any residue-aspartate (DXD) (or aspartate-any r ...
Nutrition: Protein
Nutrition: Protein

... protein intake of 0.7 to 0.9 g per pound of body weight per day is roughly double the Recommended Dietary Allowance for protein. Assuming the athlete is consuming enough calories, this level of protein intake should be sufficient to build muscle when combined ...
Oxidations – loss of electrons
Oxidations – loss of electrons

... – Soluble, membrane-bound, move within membrane ...
< 1 ... 276 277 278 279 280 281 282 283 284 ... 622 >

Amino acid synthesis

Amino acid synthesis is the set of biochemical processes (metabolic pathways) by which the various amino acids are produced from other compounds. The substrates for these processes are various compounds in the organism's diet or growth media. Not all organisms are able to synthesise all amino acids. Humans are excellent example of this, since humans can only synthesise 11 of the 20 standard amino acids (aka non-essential amino acid), and in time of accelerated growth, arginine, can be considered an essential amino acid.A fundamental problem for biological systems is to obtain nitrogen in an easily usable form. This problem is solved by certain microorganisms capable of reducing the inert N≡N molecule (nitrogen gas) to two molecules of ammonia in one of the most remarkable reactions in biochemistry. Ammonia is the source of nitrogen for all the amino acids. The carbon backbones come from the glycolytic pathway, the pentose phosphate pathway, or the citric acid cycle.In amino acid production, one encounters an important problem in biosynthesis, namely stereochemical control. Because all amino acids except glycine are chiral, biosynthetic pathways must generate the correct isomer with high fidelity. In each of the 19 pathways for the generation of chiral amino acids, the stereochemistry at the α-carbon atom is established by a transamination reaction that involves pyridoxal phosphate. Almost all the transaminases that catalyze these reactions descend from a common ancestor, illustrating once again that effective solutions to biochemical problems are retained throughout evolution.Biosynthetic pathways are often highly regulated such that building-blocks are synthesized only when supplies are low. Very often, a high concentration of the final product of a pathway inhibits the activity of enzymes that function early in the pathway. Often present are allosteric enzymes capable of sensing and responding to concentrations of regulatory species. These enzymes are similar in functional properties to aspartate transcarbamoylase and its regulators. Feedback and allosteric mechanisms ensure that all twenty amino acids are maintained in sufficient amounts for protein synthesis and other processes.
  • studyres.com © 2026
  • DMCA
  • Privacy
  • Terms
  • Report