Phosphorylation and biosynthesis of high molecular weight proteins of tumor nuclear matrix

INTRODUCTIONAsearlyasin1948wehavefr8CtionatedisolatednucleifromnormalandtumorcellsbyextractionwithiMNaCIanddilutealkali[1].Thenuclearresiduewasthenstudiedmorethoroughly[2,3].Lateron,sillillarproteinousnuclearresidueswereisolatedbyotherworkers[46]andasstud…     

Nitric Oxide:from a mysterious labile factor to the molecule of the Nobel Prize Recent progress in nitric oxide research

INTR0DUCTI0N:Nitric0xideandN0belPrizeScientificbreakthrough0ftenc0mesfr0munexpected0bserwtions,andimaginativeadventurousreseaxch.Intheearly8O'sattheNewYorkLab0ratoryofSunyHealthCentre,Dr.RobertFurchgottwaspresentedcontradictingresultsbyhistwotechnicians.Onetechnicianalwaysf0undtheacetycholinerelaxedthebloodvessel,whereasthe0therfounditalwayscausedcontraction.Furchg0ttnoticedthatonetechnicianhandledthevesselsroughlyandinadvertentlyrubbedoffthethinlayerofendotheliumfromthesurfaceoftheve…     

MURID RODENTS FROM THE LATE PLIOCENE OF YANGQUAN AND YUXIAN, HEBEI

<正> Daodi is considered to be a late Pliocene locality near Nihewan, a classic site well known for its abundant and diverse Plio-Pleistocene mammalian fossils. An assemblage of micromammals was collected by the first author from eight quarries at Daodi by screen-washing in 1984. Preliminary reports on 26 species of small mammals collected and more detailed studies of lagomorphs have been given (see Cai, 1987; 1989). This paper deals with the material of the rodent family Muridae in the collections.     

NEW MATERIAL OF HSISOSUCHUS CHUNGKINGENSIS FROM SICHUAN, CHINA

AnewspecimenofHIitoIuchuschungkingensis,inc1udingthecraniumandmostofthep0stcranium,wascollectedbyone0fus(X.-M-Li)inearlyl960sfr0mthJurassicsandstoneoftheSangqia0area,Yongchuancounty,about60kmsouthwesIofChongqing.Thisspecimenpr0babIyrepresentsayoungadult0rasubadu1t,a5indicatedbyitssmal1size(lessthan2/3length0fthetype,basedontheskul]proportion)andopensuturesbetweenpalatalelements.lnthepresentpaperwewillredescribeH.chungkingensisindetailbasedonb0ththetypeandnewlydis-coveredspecimensinordertoc…     

NEW MATERIAL OF HELICOPRIONID SHARK FROM LIANYUAN OF HUNAN

Edestiforme8obruchev,1953HelicoprionidaeKarpinsky,l9llHunanohelicoprionxiandongensi8gen.etsp.nov.Ho1otypeApartoftooth-row,withtenteethfragments,no.XKG-F9lo1,Xi-angtanMininglnstitute.LocalityandhorizonXiandong,Lianyuan,Hunan;QixiaFormation,theLowerPermian.DisgnosisTeethofcuttingtype,lateral1ycompressed;cuttingb1adeserratedanteriorlyandposteriorly,serrationtiny;lateralwingrelativelywide,serrationontheanteriormarginirreguIarandnoserrationontheposteriormargin,"intermediateregionwithoutenam…     

A NEW PADDLEFISH FROM THE UPPER JURASSIC OF NORTHEAST CHINA

orderAdpenseriformesBerg,l94oFaedyPolyodontidaeBonaparte,l838Genu8Protopsephuru8gen.nov.TyPespede8P.liuigen.etsp.nov.Protopsephuru8liuigen.etsp.nov.(Fig.1Ipl.1)HolotypeAnearlycompletefishanditscounterpart,lackingpartofitscau-dalfin.GMV2032-la,b.Horizonandl0ealityUpperJurassicYixianF0rmation,S0ngzhangzivillage,LingyuanCounty,LiaoningProvince.Diagn0chPadd1efishofmiddlesizewithtotallengthreachinglm0rmore.Rostralpartisaboutl/40fthefishlengthwithmanyr0stralsandrareste1latebones.Derm0sphe…     

PHYLOGENETIC RELATIONSHIP OF HSISOSUCHUS

ThePoposauridae,representedbyPostosuchus(Chatterjee,1985),washypothe-sizedbymostworkersmentionedaboveasthesistergroupoftheCrocodylomor-pha.Consequently,PostotuchusandDibothrosuchus(Wu,l986;WuandChatterjee,l993),thebestknownsphenosuchian,arechosenastwosuccessiveoutgroupswhenpolarizingthecharacterstatesusedinthisstudy.Asmentionedintheearlierpa-per(Lietal.,l994),Hsisosuchusismorphologica1lyratherprimitiveinanumberofaspects,suchasthepresenceofalargeantorbitalfenestra,thepairedfrontals,theanter…     

FOSSORIAL ADAPTATIONS OF A TAENIOLABIDOID MULTITUBERCULATE MAMMAL FROM THE EOCENE OF CHINA

<正> Fragments of the postcranial skeleton of s taeniolabidoid multituberculate,? Lambdopsalis bulla, from the Eocene of Chins are described. These consist of cervical vertebrae C2-C3 (fused), a fragment of the neural arch of C4, and complete C5-C7, thoracic vertebrae T1-T3, and two humeri, which are the first Complete multituberculate humeri ever described. The fusion of C2 and C3, and the stout structure of the humerus with a very large deltopectoral crest, a wide distal end, and prominent radial and ulnar condyles, indicate a fossorial mode of life for? L. bulla. These postcranial elements and a wide flattened, skull with a vertical occipital plate, suggest adaptstions seen in some modern golden moles and cricetid rodents such as Myospalax that dig with claws and displace the soil with the head.