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Text of the page (random words):
tified by using chromatography or electrophoresis this procedure can then be repeated again to identify the next amino acid a major drawback to this technique is that the peptides being sequenced in this manner cannot have more than 50 to 60 residues and in practice under 30 the peptide length is limited due to the cyclical derivatization not always going to completion the derivatization problem can be resolved by cleaving large peptides into smaller peptides before proceeding with the reaction it is able to accurately sequence up to 30 amino acids with modern machines capable of over 99 efficiency per amino acid an advantage of the edman degradation is that it only uses 10 100 pico moles of peptide for the sequencing process the edman degradation reaction was automated in 1967 by edman and beggs to speed up the process 2 and 100 automated devices were in use worldwide by 1973 3 limitations edit because the edman degradation proceeds from the n terminus of the protein it will not work if the n terminus has been chemically modified e g by acetylation or formation of pyroglutamic acid sequencing will stop if a non α amino acid is encountered e g isoaspartic acid since the favored five membered ring intermediate is unable to be formed edman degradation is generally not useful to determine the positions of disulfide bridges protein sequencing of attomole level of edman degraded sequences are obtainable but require accelerator mass spectrometery which requires large complex and expensive equipment as well as 30 hours of bench time to analyze a single run 4 coupled analysis edit following 2d sds page the proteins can be transferred to a polyvinylidene difluoride pvdf blotting membrane for further analysis edman degradations can be performed directly from a pvdf membrane n terminal residue sequencing resulting in five to ten amino acid may be sufficient to identify a protein of interest poi 5 see also edit bergmann degradation dansyl chloride references edit edman p högfeldt erik sillén lars gunnar kinell per olof 1950 method for determination of the amino acid sequence in peptides acta chem scand 4 283 293 doi 10 3891 acta chem scand 04 0283 edman p begg g march 1967 a protein sequenator eur j biochem 1 1 80 91 doi 10 1111 j 1432 1033 1967 tb00047 x pmid 6059350 niall hd 1973 automated edman degradation the protein sequenator part d enzyme structure methods in enzymology vol 27 pp 942 1010 doi 10 1016 s0076 6879 73 27039 8 isbn 978 0 12 181890 6 pmid 4773306 miyashita masahiro presley jack m buchholz bruce a lam kit s lee young moo vogel john s hammock bruce d april 10 2001 attomole level protein sequencing by edman degradation coupled with accelerator mass spectrometry proceedings of the national academy of sciences of the united states of america 98 8 4403 4408 bibcode 2001pnas 98 4403m doi 10 1073 pnas 071047998 pmc 31847 pmid 11287636 link aj robison k church gm 1997 comparing the predicted and observed properties of proteins encoded in the genome of escherichia coli electrophoresis electrophoresis 18 8 1259 1313 doi 10 1002 elps 1150180807 pmid 9298646 v t e topics in organic reactions addition reaction elimination reaction polymerization reagents rearrangement reaction redox reaction regioselectivity stereoselectivity stereospecificity substitution reaction a value alpha effect annulene anomeric effect antiaromaticity aromatic ring current aromaticity baird s rule baker nathan effect baldwin s rules bema hapothle beta silicon effect bicycloaromaticity bredt s rule bürgi dunitz angle catalytic resonance theory charge remote fragmentation charge transfer complex clar s rule conformational isomerism conjugated system conrotatory and disrotatory curtin hammett principle dynamic binding chemistry edwards equation effective molarity electromeric effect electron rich electron withdrawing group electronic effect electrophile evelyn effect flippin lodge angle free energy relationship grunwald winstein equation hammett acidity function hammett equation george s hammond hammond s postulate homoaromaticity hückel s rule hyperconjugation inductive effect kinetic isotope effect lfer solvent coefficients data page marcus theory markovnikov s rule möbius aromaticity möbius hückel concept more o ferrall jencks plot negative hyperconjugation neighbouring group participation 2 norbornyl cation nucleophile kennedy j p orton passive binding phosphaethynolate polar effect polyfluorene ring strain σ aromaticity spherical aromaticity spiroaromaticity steric effects superaromaticity swain lupton equation taft equation thorpe ingold effect vinylogy walsh diagram woodward hoffmann rules woodward s rules y aromaticity yukawa tsuno equation zaitsev s rule σ bishomoaromaticity list of organic reactions carbon carbon bond forming reactions acetoacetic ester synthesis acyloin condensation aldol condensation aldol reaction alkane metathesis alkyne metathesis alkyne trimerisation alkynylation allan robinson reaction arndt eistert reaction auwers synthesis aza baylis hillman reaction barbier reaction barton kellogg reaction baylis hillman reaction benary reaction bergman cyclization biginelli reaction bingel reaction blaise ketone synthesis blaise reaction blanc chloromethylation bodroux chichibabin aldehyde synthesis bouveault aldehyde synthesis bucherer bergs reaction buchner ring expansion cadiot chodkiewicz coupling carbonyl allylation carbonyl olefin metathesis castro stephens coupling chan rearrangement chan lam coupling claisen condensation claisen rearrangement claisen schmidt condensation combes quinoline synthesis corey fuchs reaction corey house synthesis coupling reaction cross coupling reaction cross dehydrogenative coupling cross coupling partner dakin west reaction darzens reaction diels alder reaction doebner reaction wulff dötz reaction ene reaction enyne metathesis ethenolysis favorskii reaction ferrier carbocyclization friedel crafts reaction fujimoto belleau reaction fujiwara moritani reaction fukuyama coupling gabriel colman rearrangement gattermann reaction glaser coupling grignard reaction grignard reagent hammick reaction heck reaction henry reaction heterogeneous metal catalyzed cross coupling high dilution principle hiyama coupling homologation reaction horner wadsworth emmons reaction hydrocyanation hydrovinylation hydroxymethylation ivanov reaction johnson corey chaykovsky reaction julia olefination julia kocienski olefination kauffmann olefination knoevenagel condensation knorr pyrrole synthesis kolbe schmitt reaction kowalski ester homologation kulinkovich reaction kumada coupling liebeskind srogl coupling malonic ester synthesis mannich reaction mcmurry reaction meerwein arylation methylenation michael reaction minisci reaction mizoroki heck vs reductive heck nef isocyanide reaction nef synthesis negishi coupling nierenstein reaction nitro mannich reaction nozaki hiyama kishi reaction olefin conversion technology olefin metathesis palladium nhc complex passerini reaction peterson olefination pfitzinger reaction piancatelli rearrangement pinacol coupling reaction prins reaction quelet reaction ramberg bäcklund reaction rauhut currier reaction reformatsky reaction reimer tiemann reaction rieche formylation ring closing metathesis robinson annulation sakurai reaction seyferth gilbert homologation shapiro reaction sonogashira coupling stetter reaction stille reaction stollé synthesis stork enamine alkylation suzuki reaction takai olefination thermal rearrangement of aromatic hydrocarbons thorpe reaction ugi reaction ullmann reaction wagner jauregg reaction weinreb ketone synthesis wittig reaction wurtz reaction wurtz fittig reaction zincke suhl reaction homologation reactions arndt eistert reaction hooker reaction kiliani fischer synthesis kowalski ester homologation methoxymethylenetriphenylphosphorane seyferth gilbert homologation wittig reaction olefination reactions bamford stevens reaction barton kellogg reaction boord olefin synthesis chugaev elimination cope reaction corey winter olefin synthesis dehydrohalogenation elimination reaction grieco elimination hofmann elimination horner wadsworth emmons reaction hydrazone iodination julia olefination julia kocienski olefination kauffmann olefination mcmurry reaction peterson olefination ramberg bäcklund reaction shapiro reaction takai olefination wittig reaction carbon heteroatom bond forming reactions azo coupling bartoli indole synthesis boudouard reaction cadogan sundberg indole synthesis diazonium compound esterification grignard reagent haloform reaction hegedus indole synthesis hurd mori 1 2 3 thiadiazole synthesis kharasch sosnovsky reaction knorr pyrrole synthesis leimgruber batcho indole synthesis mukaiyama hydration nenitzescu indole synthesis oxymercuration reaction reed reaction schotten baumann reaction ullmann condensation williamson ether synthesis yamaguchi esterification degradation reactions barbier wieland degradation bergmann degradation edman degradation emde degradation gallagher hollander degradation hofmann rearrangement hooker reaction isosaccharinic acid marker degradation ruff degradation strecker degradation von braun amide degradation weerman degradation wohl degradation organic redox reactions acyloin condensation adkins peterson reaction akabori amino acid reaction alcohol oxidation algar flynn oyamada reaction amide reduction andrussow process angeli rimini reaction aromatization autoxidation baeyer villiger oxidation barton mccombie deoxygenation bechamp reduction benkeser reaction bergmann degradation birch reduction bohn schmidt reaction bosch reaction bouveault blanc reduction boyland sims oxidation cannizzaro reaction carbonyl reduction clemmensen reduction collins oxidation corey itsuno reduction corey kim oxidation corey winter olefin synthesis criegee oxidation dakin oxidation davis oxidation deoxygenation dess martin oxidation dna oxidation elbs persulfate oxidation emde degradation eschweiler clarke reaction étard reaction fischer tropsch process fleming tamao oxidation fukuyama reduction ganem oxidation glycol cleavage griesbaum coozonolysis grundmann aldehyde synthesis haloform reaction hydrogenation hydrogenolysis hydroxylation jones oxidation kiliani fischer synthesis kolbe electrolysis kornblum oxidation kornblum delamare rearrangement leuckart reaction ley oxidation lindgren oxidation lipid peroxidation lombardo methylenation luche reduction markó lam deoxygenation mcfadyen stevens reaction meerwein ponndorf verley reduction methionine sulfoxide miyaura borylation mozingo reduction noyori asymmetric hydrogenation omega oxidation oppenauer oxidation oxygen rebound mechanism ozonolysis parikh doering oxidation pinnick oxidation prévost reaction reduction of nitro compounds reductive amination riley oxidation rosenmund reduction rubottom oxidation sabatier reaction sarett oxidation selenoxide elimination shapiro reaction sharpless asymmetric dihydroxylation epoxidation of allylic alcohols sharpless epoxidation sharpless oxyamination stahl oxidation staudinger reaction stephen aldehyde synthesis swern oxidation transfer hydrogenation wacker process wharton reaction whiting reaction wohl aue reaction wolff kishner reduction wolffenstein böters reaction zinin reaction rearrangement reactions 1 2 rearrangement 1 2 wittig rearrangement 2 3 sigmatropic rearrangement 2 3 wittig rearrangement achmatowicz reaction alkyne zipper reaction allen millar trippett rearrangement allylic rearrangement alpha ketol rearrangement amadori rearrangement arndt eistert reaction aza cope rearrangement baker venkataraman rearrangement bamberger rearrangement banert cascade beckmann rearrangement benzilic acid rearrangement bergman cyclization bergmann degradation boekelheide reaction brook rearrangement buchner ring expansion carroll rearrangement chan rearrangement claisen rearrangement cope rearrangement corey fuchs reaction cornforth rearrangement criegee rearrangement curtius rearrangement demjanov rearrangement di π methane rearrangement dimroth rearrangement divinylcyclopropane cycloheptadiene rearrangement dowd beckwith ring expansion reaction electrocyclic reaction ene reaction enyne metathesis favorskii reaction favorskii rearrangement ferrier carbocyclization ferrier rearrangement fischer hepp rearrangement fries rearrangement fritsch buttenberg wiechell rearrangement gabriel colman rearrangement group transfer reaction halogen dance rearrangement hayashi rearrangement hofmann rearrangement hofmann martius rearrangement ireland claisen rearrangement jacobsen rearrangement kornblum delamare rearrangement kowalski ester homologation lobry de bruyn van ekenstein transformation lossen rearrangement mcfadyen stevens reaction mclafferty rearrangement meyer schuster rearrangement mislow evans rearrangement mumm rearrangement myers allene synthesis nazarov cyclization reaction neber rearrangement newman kwart rearrangement overman rearrangement oxy cope rearrangement pericyclic reaction piancatelli rearrangement pinacol rearrangement pummerer rearrangement ramberg bäcklund reaction ring expansion and contraction ring closing metathesis rupe reaction schmidt reaction semipinacol rearrangement seyferth gilbert homologation sigmatropic reaction skattebøl rearrangement smiles rearrangement sommelet hauser rearrangement stevens rearrangement stieglitz rearrangement thermal rearrangement of aromatic hydrocarbons tiffeneau demjanov rearrangement vinylcyclopropane rearrangement wagner meerwein rearrangement wallach rearrangement weerman degradation westphalen lettré rearrangement willgerodt rearrangement wolff rearrangement ring forming reactions 1 3 dipolar cycloaddition annulation azide alkyne huisgen cycloaddition baeyer emmerling indole synthesis bartoli indole synthesis bergman cyclization biginelli reaction bischler möhlau indole synthesis bischler napieralski reaction blum ittah aziridine synthesis bobbitt reaction bohlmann rahtz pyridine synthesis borsche drechsel cyclization bucherer carbazole synthesis bucherer bergs reaction cadogan sundberg indole synthesis camps quinoline synthesis chichibabin pyridine synthesis cook heilbron thiazole synthesis cycloaddition darzens reaction davis beirut reaction de kimpe aziridine synthesis debus radziszewski imidazole synthesis dieckmann condensation diels alder reaction feist benary synthesis ferrario ackermann reaction fiesselmann thiophene synthesis fischer indole synthesis fischer oxazole synthesis friedländer synthesis gewald reaction graham reaction hantzsch pyridine synthesis hegedus indole synthesis hemetsberger indole synthesis hofmann löffler reaction hurd mori 1 2 3 thiadiazole synthesis iodolactonization isay reaction jacobsen epoxidation johnson corey chaykovsky reaction knorr pyrrole synthesis knorr quinoline synthesis kröhnke pyridine synthesis kulinkovich reaction larock indole synthesis madelung synthesis nazarov cyclization reaction nenitzescu indole synthesis niementowski quinazoline syn...