• Study Resource
  • Explore
    • 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
File - Mr. Shanks` Class
File - Mr. Shanks` Class

... d. notice that UUU & UUC both code for phe and CUU, CUC, CUA & CUG all code for leu this indicates that the 3rd letter is the least important in the code e. only two amino acids have a unique code UGG  trp and AUG  met f. all proteins must start with met as AUG is the start code; this may be remo ...
Marine alga Sargassum horneri active component
Marine alga Sargassum horneri active component

... and cancers [4,6,7]. There are three distinct types of autophagy: macroautophagy, microautophagy, and chaperone-mediated autophagy. Macroautophagy (hereafter referred to as autophagy) comprises bulk degradation and a multi-step process by which the portions of the cytoplasm and/or organelles are seq ...
Alfred G. Gilman - Nobel Lecture
Alfred G. Gilman - Nobel Lecture

... An interesting side activity at this time was study of the ADP-ribosylation of Gs by cholera toxin. That this occurred was very strongly implied by the work of Gill {30}, Vaughan {31}, and Bourne (32) and was proven with purification of the protein. However, as purification proceeded, the capacity o ...
The bacterial divisome: ready for its close-up
The bacterial divisome: ready for its close-up

... of intact GFP/YFP is irreversible, making the BIFC fluorescence signal also irreversible; therefore, BIFC cannot be used to monitor off rates. The other in situ method is Förster resonance energy transfer (FRET). FRET is the transfer of energy from a donor fluorophore, whose emission wavelength ove ...
In the light of the haloarchaea metabolism
In the light of the haloarchaea metabolism

... hydrolases according to the classification of Henrissat [6]. Family GH13, is the largest sequence-based family of glycosyl hydrolases. This family groups together a great number of enzymes with different activities but all of them share the following characteristics: • They act on α-glycosidic bonds ...
Amino Acid Analysis Amino acid analysis refers to the methodology
Amino Acid Analysis Amino acid analysis refers to the methodology

... Hydrolysis of protein and peptide samples is necessary for amino acid analysis of these molecules. The glassware used for hydrolysis must be very clean to avoid erroneous results. Glove powders and fingerprints on hydrolysis tubes may cause contamination. To clean glass hydrolysis tubes, boil tubes ...
INTRODUCTION - international journal of advances in
INTRODUCTION - international journal of advances in

... availability of oxygen is limited which in turns decreases the oxidative phosphorylation. Intracellular creatine phosphate is rapidly decreased and intracellular phosphate is increased. The glycolysis and lactic acid production are stimulated; the increase lactic acid production leads to decrease of ...
2.3.1. Vector construction - Trace: Tennessee Research and
2.3.1. Vector construction - Trace: Tennessee Research and

... detect protein interactions over four orders of magnitude. FRAP data was analyzed using a combination of various image processing techniques and analytical models. This combined approach made it possible to estimate cell morphology parameters such as length, diameter, the effective laser probe volum ...
Ch 17 HW - WordPress.com
Ch 17 HW - WordPress.com

... 2. The attachment of a free amino acid to a specific RNA molecule is the key step in charging of tRNA . 3. In  translation , the nucleotide sequence of a piece of RNA is converted into a sequence of amino acids in a polypeptide. 4. The final RNA template for protein synthesis in eukaryotes is differ ...
The Complement of Protein Phosphatase
The Complement of Protein Phosphatase

... evolutionary ancestry. These clusters, particularly for the largely unexplored PP2C set, will be a rich source of material for plant biologists, allowing the systematic sampling of protein function by genetic and biochemical means. ...
PROTEINS IN NUCLEOCYTOPLASMIC INTERACTIONS III
PROTEINS IN NUCLEOCYTOPLASMIC INTERACTIONS III

... present. In the light of this synchrony, the remaining 19 undivided amebae were considered to have been in a late part of the G2 stage at the time of nuclear isolations. All nuclei were isolated in a spermidine-triton solution (4). T h e mean radioactive protein content of these 19 G2 nuclei was 413 ...
Sequence and evolutionary analysis of the human trypsin subfamily
Sequence and evolutionary analysis of the human trypsin subfamily

... most widely used system for classification of peptidases is the MEROPS Clan System, where enzymes are first sorted into ‘‘clans’’ (sometimes referred to as superfamilies) based on evidence of evolutionary relationship [1,7,8]. Evidence for such relationships comes primarily from the linear order of ...
Porino Va - UROP
Porino Va - UROP

... functional group on the peptide from participating in undesired side reactions. After the removal of the Fmoc proSolid Phase Peptide Synthesis tecting group, the next Fmoc protected amino acid is couSolid phase peptide synthesis (SPPS) was employed for the ...
Structure and Function of Large Bio Molecules
Structure and Function of Large Bio Molecules

... The covalent bonds that connect monomers in a polymer are disassembled by hydrolysis, a reaction that is effectively the reverse of dehydration. o The process of digestion is an example of hydrolysis within the human body.  We take in food as organic polymers that are too large for our cells to abs ...
The Gas-Phase Chemistry of Cyclodextrin Inclusion Complexes
The Gas-Phase Chemistry of Cyclodextrin Inclusion Complexes

... to obtain fundamental insight into the nature of molecular recognition. Cyclodextrins are a group of cyclic oligosaccharides composed of R(1,4)-linked glucopyranose units.1,2 The most common have six, seven, and eight units with the common names R-, β-, and γ-cyclodextrin, respectively. The utility ...
Antioxidant and antimicrobial activity of lecithin free egg yolk protein
Antioxidant and antimicrobial activity of lecithin free egg yolk protein

... studies reported the antioxidant activity of egg-yolk protein in a linoleic acid oxidation system [3,4]. The hydroxyl radical and DPPH scavenging activity and suppression of discoloration of βcarotene have been also observed. In food modeling systems, peptides derived from egg-yolk hydrolysates effe ...
Systematic Structure-Function Analysis of the Small GTPase Arf1 in Yeast.
Systematic Structure-Function Analysis of the Small GTPase Arf1 in Yeast.

... Structure-Function Analysis of Arf1p DBY9163 was sporulated and dissected, and a His⫹ Trp⫹ spore colony was selected as DBY9166. DBY9169 was constructed using primers that remove the ARF2 open reading frame plus 35 bp upstream and 26 bp downstream. The arf2::HIS3 deletion construct was transformed ...
Descriptions of translation related genes that
Descriptions of translation related genes that

... Small cytosolic ribosomal protein, involved in translation initiation and metabolic processes Component of heteroheptameric complexes, involved in mRNA processing Ribonucleoprotein involved in regulating mRNA translation, transport, processing PUF protein family member, involved in DNA metabolism an ...
Refining the Definition of Plant Mitochondrial
Refining the Definition of Plant Mitochondrial

... semitryptic peptide matches, we classified these peptides into three groups. First, peptides that were derived at both N and C termini by cleavage at a non-trypsin-cutting site. Second, peptides that were derived by a C terminus consistent with trypsin cutting but an N-terminal cleavage at a nontryp ...
Translocation of proteins across the cell envelope of Gram
Translocation of proteins across the cell envelope of Gram

... the membrane, secretory proteins are equipped with a signal peptide that is proteolytically removed by signal peptidases during or shortly after translocation [35]. In the general secretion pathway, two classes of signal peptides can be identi¢ed, i.e., the general signal peptides (type I) and the l ...
Supplements - Haiyuan Yu
Supplements - Haiyuan Yu

... protein. Loci are converted by separating the coding sequence of the transcript into codons, and aligning amino acids 1–n in the protein directly to codons 1–n in the transcript. All possible single-nucleotide variants in the transcript codon (3 possible alternate nucleotides × 3 possible positions ...
BCHM 2300 Test III - Lipids and Metabolism
BCHM 2300 Test III - Lipids and Metabolism

... 3. Which fatty acids are the most common in seeds, nuts and vegetable oils? A) omega-3 B) omega-6 C) omega-9 D) omega-12 4. Dietary fat in the small intestine ________ cholesterol absorption. A) decreases B) increases C) has no effect on D) prevents 5. Which lipoprotein has the highest percentage of ...
Approximate (generic)
Approximate (generic)

... instructive to look for practice at what happens to the charge at a number of different pHs, so that's what we're doing here. You can also make up your own peptide sequences for practice; they're more interesting if they have some ionizable side chains, not just non-ionizable R groups, since such pe ...
Cysteine 230 Modulates Tumor Necrosis Factor
Cysteine 230 Modulates Tumor Necrosis Factor

... Apoptosis is a genetically regulated biological process that plays an important role in the development and homeostasis of multicellular organisms (1–3). Thus, aberrations of this process can be detrimental to organisms. For example, excessive apoptosis causes damage to normal tissues in certain aut ...
Mutational properties of amino acid residues
Mutational properties of amino acid residues

... As François Jacob pointed out over 30 years ago, evolution is a tinkering process, and, as such, relies on the genetic diversity produced by mutation subsequently shaped by Darwinian selection. However, there is one implicit assumption that is made when studying this tinkering process; it is typica ...
< 1 ... 60 61 62 63 64 65 66 67 68 ... 656 >

Protein



Proteins (/ˈproʊˌtiːnz/ or /ˈproʊti.ɨnz/) are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Proteins perform a vast array of functions within living organisms, including catalyzing metabolic reactions, DNA replication, responding to stimuli, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific three-dimensional structure that determines its activity.A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than about 20-30 residues, are rarely considered to be proteins and are commonly called peptides, or sometimes oligopeptides. The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues. The sequence of amino acid residues in a protein is defined by the sequence of a gene, which is encoded in the genetic code. In general, the genetic code specifies 20 standard amino acids; however, in certain organisms the genetic code can include selenocysteine and—in certain archaea—pyrrolysine. Shortly after or even during synthesis, the residues in a protein are often chemically modified by posttranslational modification, which alters the physical and chemical properties, folding, stability, activity, and ultimately, the function of the proteins. Sometimes proteins have non-peptide groups attached, which can be called prosthetic groups or cofactors. Proteins can also work together to achieve a particular function, and they often associate to form stable protein complexes.Once formed, proteins only exist for a certain period of time and are then degraded and recycled by the cell's machinery through the process of protein turnover. A protein's lifespan is measured in terms of its half-life and covers a wide range. They can exist for minutes or years with an average lifespan of 1–2 days in mammalian cells. Abnormal and or misfolded proteins are degraded more rapidly either due to being targeted for destruction or due to being unstable.Like other biological macromolecules such as polysaccharides and nucleic acids, proteins are essential parts of organisms and participate in virtually every process within cells. Many proteins are enzymes that catalyze biochemical reactions and are vital to metabolism. Proteins also have structural or mechanical functions, such as actin and myosin in muscle and the proteins in the cytoskeleton, which form a system of scaffolding that maintains cell shape. Other proteins are important in cell signaling, immune responses, cell adhesion, and the cell cycle. Proteins are also necessary in animals' diets, since animals cannot synthesize all the amino acids they need and must obtain essential amino acids from food. Through the process of digestion, animals break down ingested protein into free amino acids that are then used in metabolism.Proteins may be purified from other cellular components using a variety of techniques such as ultracentrifugation, precipitation, electrophoresis, and chromatography; the advent of genetic engineering has made possible a number of methods to facilitate purification. Methods commonly used to study protein structure and function include immunohistochemistry, site-directed mutagenesis, X-ray crystallography, nuclear magnetic resonance and mass spectrometry.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report