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peptides at Biology News

Epstein-Barr virus protein crucial to its role in blood cancers

...ar case of EBV-driven B-cell lymphoma. The use of peptides to block the interaction between this essential EBV protein and the specific pathway in human B cells is currently underway. Initial studies show that the growth of EBV-associated cancer cells can be inhibited in tissue-culture assays. The investigat...

Defensins neutralize anthrax toxin

...ar case of EBV-driven B-cell lymphoma. The use of peptides to block the interaction between this essential EBV protein and the specific pathway in human B cells is currently underway. Initial studies show that the growth of EBV-associated cancer cells can be inhibited in tissue-culture assays. The investigat...

To control germs, scientists deploy tiny agents provocateurs

...ony by continuously exchanging small molecules and peptides - a process known as quorum sensing. Past a certain density threshold, the colonies unite to initiate group behaviors, such as biofilm formation. Attempting to manipulate quorum sensing in both plant and animal bacteria, Blackwell and her team are d...

Product improves peptide identification for proteomics research

...ence researchers to identify 60 to 80 percent more peptides than preceding models in proteomics applications, such as protein identification and biomarker discovery, potentially leading to a better understanding of diseases like cancer and speeding drug development efforts. The Agilent 1100 Series LC/MSD Trap...

Newly Discovered 'Branding' Process Helps Immune System Cells Pick Their Fights

...nue's group showed that this chemical modifies the peptides presented by antigen-presenting cells in several d...rious types of T cells would react to the modified peptides shown to them by antigen-presenting cells. Unanue's group is working to substantiate their findings...

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peptides at Biology Products

Peptide Synthesis from Sigma-Genosys

...PLC analyses to verify composition and purity. All peptides are shipped lyophilized and as gross weight. Delivery Actual processing time is dependent on the peptide sequence, length and modifications. Please consult Sigma-Genosys for a production estimate of your peptide. Estimated delivery times are st...

ProteinChip beta-amyloid multipeptide detection Kit from Ciphergen

...Chip Systems, makes detecting a variety of amyloid peptides more straightforward and faster than ever before. - Clinical neuroscience proteomics applications - Monitor beta-amyloid expression after drug treatment - Correlate beta-amyloid peptide levels with disease progression - Evaluate mechanisms of Alzheim...

ProteoSpin Micro CBED Kit from Norgen Biotek Corporation

...ge mechanism, a broad size range of proteins, from peptides to antibodies can be processed. Proteins bind while salts are discarded in flowthrough - SiC has an inherent low affinity for salt, but high affinity for proteins, providing salt removal and buffer exchange simultaneously. Suitable for downstream app...

Ph.D. Peptide Display Cloning System from New England Biolabs

...pIII fusion, resulting in a valency of 5 displayed peptides per virion. The use of a phage vector, rather than a phagemid, simplifies the intermediate amplification steps, since neither antibiotic selection nor helper phage superinfection are required. Since displayed proteins longer than 20-30 amino acids ha...

EvoQuest Custom Peptide Services from Invitrogen

...s (digestion & analysis) Aliquoting - order your peptides pre-aliquoted for convenience. Rapid, Cost-Effective Peptide Synthesis...

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peptides at Biology Technology

Low Abundance cDNA Cloned Using Stratagenes Human Universal cDNA Library

... We obtained partial sequences from 23 peptides that were derived from two independent exp...six reading frames (tBLASTn). At least nine of the peptides were identified in partial sequences from the four EST cDNAs ( Figure 1 ). However, ...

Antibodies for Studying NMDA Receptor Protein Expression and Synapse-Specific Immunolabeling

.... Conclusions Antibodies raised against specific peptides or fusion proteins can be used tospecifically target receptor protein subunits and to localize, quantify andcharacterize receptor protein subunits in tissues and cell lines. Stratagene nowoffers sequence-specific antibodies against NR2A, NR2B and NR2...

Epitope-Tagging Vectors for Functional Analysis in Yeast

...tors also contain DNA sequences coding for epitope peptides that can be specifically recognized by monoclonal antibodies. A sequence for the FLAG epitope (DYKDDDDK 7 ) is located in the MCS downstream of the GAL1 promoter; a sequence for the c-myc epitope (EQKLISEEDL 8 ) ...

Luminol-enhanced Assay for Superoxide Anion (O2 face="Symbol" )

...oglobulin G (Fc receptors) or bacterial formylated peptides (f-met-leu-phe receptors), which are stimulated by their specific agonists. The activated receptor triggers the production or activation of NADPH oxidase, leading to the production of superoxide anion. Superoxide anion is subsequently released into t...

TKB1 Cells Identify Receptor Tyrosine Kinase Interacting Proteins

...bodies. Alternatively, phosphotyrosine-containing peptides that are chemicallysynthesized can also be used to yield similar results. However, syntheticpeptide reagents are expensive, nonrenewable, and require prior immobilizationfor such an assay (e.g., biotinylation or chemical crosslinking to a supportmatr...

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peptides at Biology Definition

Secondary metabolite

...s , phenols , iridoids , steroids , saponins , peptides , ethereal oils , resins and balsams . List of most important secondary metabolites of plants : Class Alkaloids : Hyoscyamine , present in Datura stramonium Atropine , present in Atropa belladonna , Deadly nightshade Coca...

Proteomics

...o characterize the three-dimensional structure of peptides and proteins . Tandem mass spectrometry combined with reverse phase chromatography or 2-D electrophoresis is used to identify and quantify all the levels of proteins found in cells. Affinity chromatography , yeast two hybrid techniques, f...

Proteolysis

...ranslation . Removal of the signal sequence of peptides after their transport through a membrane Separation of viral proteins that were translated from a monocistronic mRNA Digestion of proteins from foods as a source of amino acids Conversion of predecessor-proteins (proenzymes , zymogens ...

Proteome

...ng identifies a protein by cleaving it into short peptides and then deduces the protein's identity by matchin...hand, can get sequence information from individual peptides by isolating them, colliding them with a nonreactive gas, and then cataloging the fragment ions pr...

Protein

...f amino acids are referred to as "polypeptides," " peptides " or very rarely "oligopeptides". The dividing line is somewhat undefined, although a polypeptide may be less likely to have tertiary structure and may be more likely to act as a hormone (like insulin ) rather than as an enzyme or structural elem...

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peptides at Biology Dictionary

Vitamins

...on yeast. Yeast extract is rich in amino acids , peptides , B vitamins , and trace elements . Commonly used in rich media. Full article >>> Other crops grown commercially or field-tested are a sweet potato resistant to a virus that could decimate most of the African harvest, rice with inc...

Thymine

...sitization by tryptophan or tryptophan containing peptides ; enzymatically. Full article >>> Thymine (T) Thymine is a pyrimidine base ( nitrogenous base ) and constituent of nulceotides and as such one member of the base pair A-T ( adenine - thymine ) in DNA . Guanine (G) ... Ful...

T lymphocytes

...une response depends on the creation of suitable peptides from foreign antigens for display on MHC molecule s to T lymphocytes . Full article >>> Cellular immunity is based on the inter action of MHC proteins found on surfaces of circulating cells and T lymphocytes ( white blood c...

Spinal cord

... spinal cord of the fish tail that produces neuro peptides that help control water and ion balance, blood pressure, and smooth muscle contractions. 586 uropod Posterior most appendage of many crustacea ns. Full article >>> sensory root of a spinal nerve that carries impulses to the s...

Ribonuclease

...irmation of the identities of the two crosslinked peptides . Full article >>> -rhage burst out -rhea discharge, flowing out -rhexis shredding ribonuclease A nuclease that catalyzes the hydrolysis of specific phosphodiester linkage s of RNA . ribonucleic acid RNA . Full article >...

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peptides at Medicine News

Naked DNA Vaccination May Conquer Arthritis and Multiple Sclerosis

...acked. The damage is done by small proinflammatory peptides called proinflammatory cytokines and chemokines. O... introducing engineered genes based on the culprit peptides into the body. When the patient's immune system sees these genes as outside invaders, it produces it...

Breast milk is essential

...breast milk. Their report said biologically active peptides in human milk may influence brain growth as well as the high levels of long chain polyunsaturated fatty acids....

DNA biochip for genetic screening

...ly DNA, but other types of molecules, such as RNA, peptides or libraries of organic molecules. Other prevalent technologies do not have the same potential and capabilities as ours.” Gao and her team plan to make the biochips available for fields such as genomics, proteomics, chemical genetics and other new a...

Hidden influenza virus protein found

...g through bits and pieces of “junk” peptides. Junk peptides are short protein molecules the virus creates once... goes wary, Yewdell explains. In other words, junk peptides result from genetic mistakes. The immune system cells of mice, in fact, did recognise one of the pe...

Eczema patients lack natural antibiotic in skin

...ngs demonstrate the clinical significance of these peptides in humans, and suggest that a medication containing or inducing the peptides may one day be used to fight the infections that plague millions of atopic dermatitis patients. "T...

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peptides at Medicine Products

ALS, Total ELISA Test

...dulate the binding capacity of IGFBP-3 for the IGF peptides [11]. Jones JI et al. Endocrin Rev 16:3-34, 1995 Rosenfeld RG et al. Recent Prog Horm Res 46:99-163, 1990 Shimesaki S et al. Prog Growth Factor Res 1:243-266, 1991 Lamson C et al. Growth Factors 5:19-28, 1991 Holly JMP et al. Growth Regul 4(suppl ...
peptides at Medicine Technology

TransPharma Medical Announces Positive Results of Phase I Clinical Trials for Transdermal Delivery of hPTH (1-34) for Osteoporosis Treatment

... candidates, including hydrophilicsmall molecules, peptides and proteins. About TransPharma Medical Established in 2000, TransPharma Medical Ltd. is a specialtypharmaceutical company focused on the development andcommercialization of drug products utilizing a proprietary activetransdermal drug delivery tech...

Ceragenix Compound Shows Promise for Treating Lethal Cystic Fibrosis Infections

...ore effective than positively chargedantibacterial peptides (LL-37) against a multidrug resistant strainof Pse... the presence of naturally occurring antimicrobial peptides suchas LL-37 found in the lung fluid which form part of the body'sinnate immune system. These positi...

Modigene Announces Successful Completion of Pharmacokinetic & Pharmacodynamic Pre-Clinical Experiments for Proprietary Long-Acting Human Growth Hormone, Long-acting Interferon Beta and Long-acting Erythropoietin

...pplicable to a variety of therapeutic proteins and peptides thatsuffer from weak durability and hence dictate short injectionfrequencies," said Shai Novik, Modigene's President. "We are movingforward with our preparations for GMP production of our leadprotein candidates and initiation of clinical trials there...

New Flu Vaccine from PepTcell Could Provide Immunity Against All Strains of Influenza Virus

...are highlyconserved across strains, and that these peptides are naturallypresented on the surface of flu-infec...f, Wilson Caparros-Wanderly: Syntheticmultiepitope peptides identified in silico induce protectiveimmunity against multiple influenza serotypes. European Journa...

New Flu Vaccine From PepTcell Could Provide Immunity Against All Strains of Influenza Virus

...are highlyconserved across strains, and that these peptides are naturallypresented on the surface of flu-infec...f, Wilson Caparros-Wanderly: Syntheticmultiepitope peptides identified in silico induce protectiveimmunity against multiple influenza serotypes. European Journa...

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peptides at Medicine Definition

Thymocyte

...ptosis in thymocytes with a high affinity for self peptides or MHC. This eliminates cells which would direct i...rotein able to recognise short protein sequences ( peptides ) that are presented on MHC . During the double negative stage the major maturation step of thymocy...
peptides at Medicine Dictionary

Smooth muscle

... of the smooth muscle s in the body. Kinins are peptides that can act on smooth muscle s and nerve endings. Full article >>> They lack the usual amount of smooth muscle tissue and elastin, a fibrous connective tissue . These blood vessels commonly accumulate deposits of calcium s...

Polyp

...Full article >>> Polyp eptide Many peptides joined together. For example, insulin . Protein A molecule composed of many amino acids and with a complex structure. For example, immunoglobulin , casein . Glyco protein A protein c oated with sugar s. Full article >>> ...

ELISA

...stern blot. Full article >>> Casein peptides are absorbed through the intestine and collect in the kidney s. These antibodies can be detected with a relatively simple, highly accurate blood serum test called ELISA . See also Lactose mal digestion and milk allergy . Home About us ...

Delta

...l article >>> T-cells, the antigen peptides must be presented on Class II MHC, and in the case of killer T-cells , the antigen peptides must be presented on Class I MHC. The T- cell antigen receptor consists of either an alpha / be...
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