Dab tsi yog Sandwich qauv ntawm cell membrane?
Dab tsi yog Sandwich qauv ntawm cell membrane?

Video: Dab tsi yog Sandwich qauv ntawm cell membrane?

Video: Dab tsi yog Sandwich qauv ntawm cell membrane?
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Danielli thiab Davson, thov ib qauv , npe Sandwich qauv , rau daim nyias nyias qauv nyob rau hauv uas lub lipid bilayer tau coated ntawm nws ob sab nrog hydrated proteins (globular proteins). Electrostatic los yog van der Waals daim ntawv cog lus tuaj yeem khi lwm pab pawg rau sab nrauv protein.

Nyob rau hauv kev hwm rau qhov no, dab tsi yog qhov txawv cell membrane qauv?

ADVERTISEMENTS: Cov ntsiab lus hauv qab no qhia txog plaub qhov keeb kwm saum toj kawg nkaus qauv ntawm Plasma Membrane . Cov qauv yog: 1. Lipid thiab Lipid Bilayer Cov qauv 2.

Dannelli Qauv.

  • Lipid thiab Lipid Bilayer Model:
  • Unit Membrane Model (Protein-Lipid Bilayer-Protein):
  • Cov kua dej Mosaic Model:

Ib yam li ntawd, leej twg tau muab cov lamellar lossis cov qhaub cij ntawm cov cell membrane? Hugh Davson

Khaws qhov no hauv kev xav, vim li cas davson Danielli tus qauv tsis raug?

Cov khoom tsis muaj polar protein yuav cais cov polar feem ntawm phospholipids los ntawm dej, ua rau lub bilayer yaj. Lub ntsiab lus, lub Davson - Danielli qauv tsis yog xwb tsis raug , tab sis nws kuj tsis yooj yim sua. Vim li no, phospholipid bilayer sandwiched rau sab hauv yuav nyob cais tawm ntawm dej.

Dab tsi yog cov kua dej mosaic qauv ntawm cov cell membrane?

Cov dej mosaic qauv ntawm plasma daim nyias nyias : Cov dej mosaic qauv ntawm plasma daim nyias nyias piav txog lub plasma daim nyias nyias as a kua dej Kev sib xyaw ntawm phospholipids, cholesterol, thiab proteins. Qhov chaw hydrophilic lossis dej-hlub thaj chaw ntawm cov molecules yog nyob rau hauv kev sib cuag nrog cov aqueous kua dej ob sab hauv thiab sab nraud cell.

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