简介：Inordertostudythefunctionalstructureofthetranscriptionterminatorsandthemechanismoftemination,asurveyofthechromatinstructure,includingthelocationofDNaseIhypersensitivesitesandthenucleosomearrangement,ofyeastADH1andFLPterminatorswasmade.TheresultsshowthatthereisnorelationshipbetweenthefunctionoftheterminatorsandtheexistenceofDNaseIhypersensitivesites.However,itisfoundthatthereisalwaysanucleosmoeattheimmediateupstreamofthetranscriptionalterminationsites.Asacontrol,thechromatinstructuresofthepBR322DNAfragmentsontheyeastshuttervectorsarealsoinvestigatedatthesametime.TherandomnucleosomearrangementonthebacterialDNAinyesastagreeswiththepublishedreports.Anewhypothesis,aboutthemechanismoftranscriptionalterminationisputforwardandthereasonofdifferentnucleosomearrengementontheDNAswhichareoriginallyfromdifferentspeciesinyeastisdiscussed.

简介：Inordertostudythefunctionalstructureofthetranscriptionterminatorsandthemechanismoftermination,asurveyofthechromatinstructure,includingthelocationofDNaseIhypersensitivesitesandthenucleosomearrangement,ofyeastADH1andFLPterminatorswasmade.TheresultsshowthatthereisnorelationshipbetweenthefunctionoftheterminatorsandtheexistenceofDNaseIhypersensitivesites.However,itisfoundthatthereisalwaysanucleosomeattheimmediateupstreamofthetranscrip-tionalterminationsites.Asacontrol,thechromatinstructuresofthepBR322DNAfragmentsontheyeastshuttervectorsarealsoinvestigatedatthesametime.TherandomnucleosomearrangementonthebacterialDNAinyeastagreeswiththepublishedreports.Anewhypothesis,aboutthemechanismoftranscriptionalterminationisputforwardandthereasonofdifferentnucleosomearrangementontheDNAswhichareori-ginallyfromdifferentspeciesinyeastisdiscussed.

简介：TheTK-selectedchromosome-mediategenetransferlineswereanalysedusingDNAdotblotmethod,G-11bandingandinsituhybridization.TheresultsshowedthatCMGTcanprovideawidevarietyofintermediatesizeofthetransgenomefromgreaterthan80,000kbtolessthan2,000kb.SomeoftransfectantsareintergratedintomousechromosomewhichcanbedetectedbyG-11bandingandinsituhybridization