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Sökning: WFRF:(Zhou GQ)

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  • CAMPBELL, D, et al. (författare)
  • ELECTRON-TRANSPORT REGULATES EXCHANGE OF 2 FORMS OF PHOTOSYSTEM-II D1 PROTEIN IN THE CYANOBACTERIUM SYNECHOCOCCUS
  • 1995
  • Ingår i: EMBO Journal. - 0261-4189 .- 1460-2075. ; 14:22, s. 5457-5466
  • Tidskriftsartikel (refereegranskat)abstract
    • Synechococcus sp, PCC 7942 modulates photosynthetic function by transiently replacing the constitutive D1 photosystem II protein, D1:1, with an alternate form, D1:2, to help counteract photoinhibition under excess light, We show that a temperature drop from 37 to 25 degrees C also drives D1:1/D1:2 exchange under constant, moderate light, Chilling or light-induced D1 exchange results from rapid loss of psbAI message coding for D1:1 and accumulation of psbAII and psbAIII messages coding for D1:2, During chilling, a large pool of a novel form, D1:2*, transiently accumulates, distinguishable from normal D1 by an increase in apparent molecular mass, D1:* is not phosphorylated and is probably a functionally inactive, incompletely processed precursor, After acclimation to 25 degrees C, D1:2* disappears and D1:1 again predominates, although substantial D1:2 remains, Partial inhibition of electron transport under constant, moderate light also triggers the D1 exchange process, These treatments all increase excitation pressure on photosystem II relative to electron transport, Therefore, information from photosynthetic electron transport regulates D1 exchange without any requirement for a change in light intensity or quality, possibly via a redox sensing mechanism proximal to photosystem II.
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  • CHEN, JY, et al. (författare)
  • A POSSIBLE EARLY CAMBRIAN CHORDATE
  • 1995
  • Ingår i: NATURE. - : MACMILLAN MAGAZINES LTD. - 0028-0836. ; 377:6551, s. 720-722
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • THE first chordate recorded from the Early Cambrian is the cephalochordate Yunnanozoon lividum from the 525 million-year-old Chengjiang fauna. Chordate features of Yunnanozoon are a notochord and an expanded filter-feeding pharynx with an endostyle. Segme
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  • CHEN, JY, et al. (författare)
  • HEAD SEGMENTATION IN EARLY CAMBRIAN FUXIANHUIA - IMPLICATIONS FOR ARTHROPOD EVOLUTION
  • 1995
  • Ingår i: SCIENCE. - : AMER ASSOC ADVAN SCIENCE. - 0036-8075. ; 268:5215, s. 1339-1343
  • Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
    • The arthropod Fuxianhuia from the Chengjiang fauna displays primitive aspects of cephalic segmentation and trunk limb morphology that indicate a basal position within Euarthropoda. The cephalon consists of an eye-bearing sclerite that articulates with a h
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  • Resultat 1-10 av 19

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