Chris Lawson Science Director, Biopolymers - · PDF fileThe alpha-gal epitope and the an6 ......
Transcript of Chris Lawson Science Director, Biopolymers - · PDF fileThe alpha-gal epitope and the an6 ......
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Chris Lawson Science Director, Biopolymers
AlgalPolysaccharideWorkshop,14-15thJuly2016
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CarbosynthGlycomix
Tobealeadingsupplierofcarbohydratesand
nucleosidestoR&Dinthepharmaceutical&
biotechnologyindustries
Tobeaproviderofsolutionstofood&bioscienceR&Dthrough
structuralfunctionalknowledgeandprocess
development
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Carbosynth&Glycomix
Combinedweofferbothcarbohydrateproducts&solutions
fortheirapplicationsinfood&bioscienceR&D
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OurScienceBase� Scien6ficLeadership&Exper6se:� AComprehensiveRangeofproducts
� Monoandoligosaccharidesynthesis� Polysaccharidechemistry&biochemistry� Theanalysisoflow&highMWcarbohydratestructures
� Thestructure,func6onandapplica6onofcarbohydrates
� Processdevelopment&scaleup
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Polysaccharidesinliving6ssues
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AlgaeMicrobesFruitsSeedsAnimalTissuesFungi/Yeasts/
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PolysaccharidesintheServiceofMan� Infoods:texturemodifiers,gelling&suspensionagents� Inhealthfoods:Lowsolidsbulkingagentsforloweringcalories,cholesterol,bloodglucoseetc
� Inpharmaceu6cals:Func6onaltexturemodifiers,drugencapsula6on,gellingandsuspensionaids,drugs(heparin,pentosanpolysulphate)
� Incosme6cs:creams,waterbinders,suspensionaids� Inindustrialapplica6ons:rheology,gela6on,suspension(highsolidsoildrillingmuds,waterbasedpaint,frackingfluids,cementretarda6onetc)
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PolysaccharideCovalentStructure• Degrada6on(sugarresidues)• Methyla6on(linkageanalysis)• Par6alHydrolysis(chemical,enzyma6c)(linkage,branching)• SmithDegrada6on,AlkaliPeeling,reduc6on/oxida6on
(linkage,branching)• Spectroscopy(NMR,FTIR,MS,Ramanetc)(linkage
configura6on,anomericity,branching)• Chromatography(purity,molecularweight)• SEC-Malls,LightScaVering,Ultracentrifuge(molecular
weight)
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XanthanGum–CovalentStructure
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ReesD.A.etal,Carbohydr.Res.,46,245(1976)Lawson,C.J.,Symes,K.C.,CarbohydrRes.,58,433(1977)
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PolysaccharideSecondary&Ter6aryStructure
� CovalentStructure� X-rayCrystallography� NMRSpectroscopy� CircularDichroism� PolarisedInfrared� Op6calRotaryDispersion� ComputerModelBuilding
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DoubleHelixofκ-carrageenan
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DeaI.C.M,McKinnonA.A,ReesD.A.,J.Mol.Biol.,68,153(1972)LawsonC.JandReesD.A.,Nature,227,392(1970)
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CarrageenanGela6onMechanism
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RobinsonG.,MorrisE.R.,ReesD.A.,J.Chem.Soc.,Chem.Commun.,4,152(1980)
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1970’sBinaryPolysaccharideSynergyDescribed
DeaI.C.M.,MorrisE.R.,ReesD.A.,&WelshE.J.,CarbohydRes,57,249(1977)
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2010,TernaryPolysaccharideSynergyExaminedintheUltracentrifuge
Ananaly6calultracentrifugestudyonternarymixturesofkonjacglucomannansupplementedwithsodiumalginateandxanthangum.
AbdelhameedA.S.,AngS.,MorrisG.A.,LawsonC.,GahlerR.,WoodS.AndHardingS.E.CarbohydratePolymers,81,145(2010)
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ReadyMadeCovalentLinksfromPolysaccharides
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Carrageenan
Galα1-3GalThealpha-galepitopeandthean6-Galan6bodyinxenotransplanta6onandincancerimmunotherapy
Reinves6ga6onoftheAcetolysisProductsofCarrageenan,Revisionofthestructureofα-1-3-GalactotrioseandaFurtherExampleoftheReverseSpecifici6esofGlycosideHydrolysisand
Acetolysis.LawsonC.J.ReesD.A.,J.Chem.Soc(1968)1301
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Chris Lawson Science Director, Biopolymers
AlgalPolysaccharideWorkshop,14-15thJuly2016