Qhov sib txawv tseem ceeb ntawm cov kua mosaic qauv thiab cov qauv sandwich yog cov kua dej mosaic qauv hais tias cov cell membrane yog cov kua phospholipid bilayer uas cov proteins yog ib feem los yog tag nrho embedded thaum sandwich qauv piav txog cell membrane qauv raws li ib tug lipid txheej. Sandwiched ntawm ob txheej txheej protein.
Muaj ntau tus qauv uas piav qhia cov qauv ntawm cov cell membrane. Cov qauv dej mosaic thiab cov qauv sandwich yog ob qho qauv zoo li no. Cov kua dej mosaic qauv tshaj tawm tias cov protein loj (glycoprotein) cov molecules yog embedded nyob rau hauv lub bilayer ntawm phospholipids. Nws yog tus qauv tseeb tshaj plaws ntawm cov cell membrane. Sandwich qauv, ntawm qhov tod tes, hais tias phospholipid bilayer yog sandwiched ntawm ob txheej ntawm cov protein. Nws yog thawj tus qauv los piav txog cov qauv cell membrane.
Cov kua dej Mosaic yog dab tsi?
Cov qauv dej mosaic yog tus qauv tseeb tshaj plaws uas piav qhia cov qauv ntawm cov cell membrane. Raws li cov qauv no, glycoproteins (loj protein molecules) yog embedded ib nrab los yog tag nrho nyob rau hauv lub phospholipid bilayer. Cov qauv no kuj suav nrog ob qho tib si thiab cov khoom siv peripheral. Lub mosaic xwm ntawm cov cell membrane feem ntau yog vim yog homogenous faib ntawm cov proteins hauv lipid bilayer. Sib nrug los ntawm phospholipid thiab cov proteins, muaj cov carbohydrates molecules nyob rau sab nrauv ntawm lub cell membrane. Lawv pom muaj khi rau ob qho tib si rau cov proteins (ua glycoproteins) lossis rau lipids (ua glycolipids). Muaj cov roj cholesterol molecules, thiab.
Daim duab 01: Tus Qauv Dej Mosaic
Hauv luv luv, cov qauv dej mosaic txheeb xyuas cov cell membrane li mosaic ntawm phospholipids, cholesterol, proteins, thiab carbohydrates. G. L. Nicholson thiab S. L. Tus neeg hu nkauj tau npaj cov kua dej mosaic qauv hauv xyoo 1972.
Sandwich Model yog dab tsi?
Sandwich qauv yog thawj tus qauv uas piav qhia cov qauv ntawm cov cell membrane. Cov qauv no tau npaj rau xyoo 1935 los ntawm Hugh Davson thiab James Danielli. Nws hais tias lipid txheej yog sandwiched ntawm ob txheej protein. Hauv cov lus yooj yim, nws piav qhia tias phospholipid bilayer nyob nruab nrab ntawm ob txheej ntawm globular proteins.
Daim duab 02: Sandwich Model
Raws li cov qauv qhaub cij, lub cell membrane yog trilaminar thiab lipoproteinous. Muaj ob txheej ntawm cov protein; ib tug tig rau sab hauv ntawm lub xov tooj ntawm tes thiab lwm yam yog tig rau sab nraud milieu. Li no, cov proteins tsis cuam tshuam cov lipid bilayer raws li cov qauv qhaub cij.
Dab tsi yog qhov zoo sib xws ntawm cov kua Mosaic qauv thiab Sandwich qauv?
- Cov qauv kua dej mosaic thiab cov qauv sandwich yog ob qho qauv sib txawv uas piav qhia cov qauv ntawm cov cell membrane.
- Cov qauv no sim piav qhia txog txoj haujlwm ntawm cov proteins hauv cell membrane.
- Ob leeg hais txog qhov muaj glycoproteins thiab phospholipid bilayer.
Dab tsi yog qhov txawv ntawm cov kua Mosaic qauv thiab Sandwich qauv?
Cov qauv kua dej mosaic yog cov qauv uas hais tias cov protein ntau molecules yog embedded ib nrab los yog tag nrho nyob rau hauv lub lipid bilayer thaum lub qhaub cij qauv piav qhia lub cell membrane qauv raws li ib tug lipid txheej sandwiched ntawm ob txheej protein. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm cov kua dej mosaic qauv thiab cov qauv sandwich. Raws li cov kua dej mosaic qauv, cov proteins yog embedded ib nrab los yog tag nrho. Nyob rau hauv sib piv, raws li cov qauv qhaub cij, muaj ob txheej ntawm cov proteins, thiab cov protein txheej txheej txheej txheej txheej. G. L. Nicholson thiab S. L. Tus neeg hu nkauj tau npaj cov kua dej mosaic qauv hauv xyoo 1972 thaum Hugh Davson thiab James Danielli tau npaj cov qauv qhaub cij xyoo 1935.
Hauv qab infographic piv ob tus qauv thiab teev qhov sib txawv ntawm cov kua mosaic qauv thiab cov qauv sandwich.
Summary – Kua Mosaic Model vs Sandwich Model
Tus qauv dej mosaic piav qhia cov ntshav plasma ua cov mosaic ntawm phospholipids, cholesterol, proteins, thiab carbohydrates. Nws kuj piav qhia txog yuav ua li cas cov proteins yog ib feem lossis tag nrho kos rau hauv phospholipid bilayer. Qhov no yog tus qauv tseeb tshaj plaws uas piav qhia txog cov qauv ntawm cov cell membrane. Sandwich qauv yog thawj tus qauv uas piav txog cov cell membrane. Raws li cov qauv qhaub cij, phospholipid bilayer yog sandwiched ntawm ob txheej txheej protein. Raws li cov qauv qhaub cij, cov proteins tsis hla ntawm daim nyias nyias. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm cov kua mosaic qauv thiab cov qauv sandwich.
