peptides

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...

Sample Preparation for Microinjection

... be used for injection, because some peptides rapidly degrade in the cells after injection. Oligonucleotides Purification The purification of oligonucleotide solutions is very important. Clea...

Identification of Low-Level Oxidation Products in Calmodulin Using NanoSpray Ion Trap Mass Spectrometry

...s. 2) The method for sequencing these peptides and determining the exact site of oxidation. (This is especially useful for peptides containing Met residues) 3) Complete characterization of oxidized CaM in a single exper...

Structural Analysis of Glycosylated Peptides in Complex Mixtures with Ion Trap MSn

...e fragments are separated using HPLC and the peptides are identified by on-line MS analysis using electr...fied as tPA. Sequence coverage is shown. The peptides highlighted in red were immediately identified using TurboSEQUEST, representing 79% coverage o...

Quantification of the Purinergic Receptor P2X3 using ICAT and Orthogonal 2D LC-MS/MS with an Ion Trap Mass Spectrometer

...ops), and to resolve and measure the labeled peptides in the midst of a very complex matrix. ...xamined by RP-HPLC to verify the presence of peptides prior to analysis by 2D LC-MS/MS. Figure 2. Graphical u...

Detection and Identification of Phosphorylation Sites in Proteins Using LC/MS/MS with Neutral Fragment Loss Mapping

...mentation spectra. (3) The MS/MS spectra of peptides provide a wealth of information enabling the assig... Figure 1. Phosphorylated peptides exhibit a prominent loss of a phosphate group in their MS/MS spectra. A loss of 49 amu o...

Setting up a kinase profiler with IMAP

...Each kit includes 50-70 fluoresceinlabeled peptides arrayed in quadruplicate in a ready-to-use concent... greater than 300 mP at 1 U/mL AMPK. These peptides were then compared with an enzyme titration to identify the most sensitive assay as measured...

Isolation of Low Molecular Weight Digestion Products of the Human Platelet Thromboxane A2 Receptor, Rev A

...ns a wide mixture of proteins, from smaller peptides which cannot be separated by traditional glycine gel electrophoresis, to larger proteins not effectively purified using reversed-phase or size exclusion HPLC. In addition, the limited availability of certain receptor proteins ...

Detection, identification, and quantitation of an olive allergen using Ettan MDLC, MS/MS, and DeCyder MS

...nospray interface was used as the detector for the peptides that eluted from the RPC column. Full scan mass sp...troid mode. Detection of significantly varying peptides using DeCyder MS Detection, profile comparison, background subtraction, and quantitation were done...

2D-LC analysis of phosphopeptides in brain tissue using Ettan MDLC and Finnigan LTQ

...alyses (2). <P >Separation of the tryptic peptides was performed in two dimensions, SCX followed by R...d for detecting phosphopeptides by fragmenting all peptides that exhibited a neutral loss of phosphoric acid. <P > Materials ...

Sensitive identification of phosphopeptides in brain tissue using Ettan MDLC and Finnigan LTQ

...nalyses (2). <P >Separation of the tryptic peptides was performed in two dimensions, SCX followed by R...d for detecting phosphopeptides by fragmenting all peptides that exhibited a neutral loss of phosphoric acid. <P > Methods ...

Development of a CRF1 neuropeptide receptor binding assay using LEADseeker Multimodality Imaging System

...ing factor (CRF) system comprises four CRF-related peptides (CRF and urocortin 1, 2, and 3) and two G protein-coupled CRF receptor subtypes (CRF 1 and CRF 2 , which includes CRF 2 α and CRF 2 β ) (1). These receptor subtypes are positively coupled to adenylyl cyclase and show distinct expressio...

Efficient Primary Structure Elucidation of Disulfide-bridged Peptides

...imary structure determination of disulfide bridged peptides is greatly facilitated using a combination of the ...entary data for an unambiguous characterization of peptides and proteins, while simultaneously extending the range of applications. Overview ...

Multiplexed Quantitative Peptide Assays for Protein Biomarkers of Cardiovascular Disease in Human Plasma

... obtain the best sensitivity and dynamic range for peptides from a panel of putative protein biomarkers for ca...n a MIDAS workflow to selectively detect low level peptides in complex mixtures. The detection of the peptide by MRM drives the acquisition of MS/MS to confirm ...

Direct Monitoring of Solid-Phase Peptide Synthesis by MALDI-TOF MS

...rum taken after step 13. Small amounts of deletion peptides are seen in addition to small peaks representing r...s of resin can quickly be treated with TFA and the peptides analyzed with no further treatment or purification. Mass measurement can be carried out on crude sam...

Achieving Reliable Protein Quantitation Results Using ICAT Reagents, MALDITOF Mass Spectrometry, and Advanced Data Interpretation Tool

...it for protein labeling. The purified biotinylated peptides were generated from a mixture and further fraction...can be used as a potential assay to rapidly screen peptides derived from the upand down-regulated proteins that are potential bio-marker candidates in complex m...

Affinity Depletion Cartridges for Removal of Human Serum Albumin and Immunoglobulins from Human Serum

...pectrometry Workstation (ABI) from in-gel digested peptides using 10ug/mL modified bovine trypsin in 25mM ammonium bicarbonate. Anti-HSA and anti-human IgG ELISA kits (Bethyl Laboratory) were run according to the manufacture protocol. The flow-through fractions used for the ELISA were pooled from multi...

Receptor Binding Assays using Fluorescence Polarization Detection: the [FP]2TM Characterized Tracers

...ials and Methods All fluorescently labeled peptides listed below in Table 1 are available from PerkinE...ions. Performance validation of the peptides consisted of verifying appropriate pharmacology by titrating the binding event with known displacers...

Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35)

...he chromophore or fluorophore is attached near the peptides cleavage site and enzymatic activity is detected by the increase in color or fluorescence. Chromogenic assays are easy in that one simply monitors the rise in absorbance above a (usually) low background. Fluorometric assays are much more sensitive th...

Fully Automated Nano-Electrospray Coupled with a Finnigan LCQ Deca XP Plus for Sub-fmol Proteomic Analysis

...l advantages compared to other loading techniques; peptides can be loaded at a higher flow rate, desalted and ...ept at 4C while waiting for analysis. The injected peptides were first loaded onto a reversed-phase poly(styrene-divinylbenzene) peptide trap (Michrom BioResour...

Complex Peptide Mixture Analysis on the Finnigan LTQ Linear Ion Trap Mass Spectrometer

...oinformatics, Geneva, Switzerland). The identified peptides were further evaluated using charge state versus c...Corr). The criteria for positive identification of peptides was XCorr > 1.5 for singly charged ions, XCorr > 2.0 for doubly charged ions, and XCorr >...

Protein Depletion for Plasma and Serum Proteomic Analysis

...ptides, and 3020 proteins with two or more peptides and were taken to represent their Core Dataset [80...m HUPO and elsewhere have successfully mapped 6342 peptides to EnsEMBL 29.35b genome build [82]. As more sensitive procedures are developed, the...

Separation of Peptides by Hydrophilic Interaction Chromatography Using TSKgel Amide-80

...vides excellent selectivity for separating peptides in hydrophilic interaction chromatography due to p... Introduction: The separation of peptides with many acidic and basic residues has always proved to be problematic with RPLC gradient e...

LC-MALDI and MALDI-MS/MS for the Analysis of Complex Peptide Mixtures

...se include (i) concentration and separation of the peptides prior to analysis, (ii) extended time available fo... MS/MS interrogation, (iii) separation of isobaric peptides resulting in increased sequence coverage. The ability to separate and concentrate the peptides prior...

Near Infrared Technology and Optical Agents For Molecular Imaging

...dies, receptorbinding ligands, small molecules, or peptides labeledwith fluorochromes. The fluorescent labels can bevisualized by excitation with an appropriate lightsource and the emitted photons captured via a CCDcamera or other optical detector. For fluorescent imaging, there are generally threepara...

Glossary for The BioPharm Guide to Fermentation and Cell Culture

... duplicating genes exponential ly. peptides Proteins consisting of fewer than 40 amino acids. phenotype The part of an organisms genotype that is expressed, and thus is generally apparent by observation. pilot plant A medium-scale bioprocessing facility used as an inter...

UW compound counters Avian flu

...u-fighting capabilities after finding that similar peptides could prevent infection by the herpes simplex virus. It is not the same team led by UW-Madison professor of virology Yoshihiro Kawaoka, who will direct the UW's Institute for Influenza Viral Research, but it is one of several research teams that coll...

At 30, biotech is an industry at a crossroads

...on process. Biotech drugs are "biologics," usually peptides and protein-based. After 30 years, the biotech industry reached a number of key milestones, according to MedAd News , including: All-time revenues of $63.1 billion, which grew 18 percent over the prior year (remember that the entire pharmaceutica...

Swiss biotech has quality of its big pharma, watch and chocolate industries

...mpanies is Bachem, one of the largest producers of peptides and a contract manufacturing organization for peptide-drug manufacturing in the world, and with several U.S. offices. Switzerland has four main biotech clusters: Bio Valley Basel, which has been the traditional home of Big Pharma companies, has m...

Stratatech Receives $4 Million Federal Grant

...hanced levels of biologically active antimicrobial peptides that healthy skin normally produces. Stratatech's products are based on a patented, unique source of pathogen-free human skin cells that was identified at the University of Wisconsin as being able to multiply indefinitely....

UW-Madison spinoff Pedrus finds more to business planning than good science

...chers, are developing two drugs based on antiviral peptides discovered in Brandt's lab. One shuts down respira...ses and the cells they were infecting. Attached to peptides proteins' smaller cousins these proteins would be absorbed into the cells and shut down the viruse...