Video: Vim li cas cov membranes muaj sidedness?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov microdomains, hu ua lipid rafts, yog paub zoo rau lawv lub luag haujlwm hauv receptor signaling ntawm plasma daim nyias nyias thiab yog Nws yog ib qho tseem ceeb rau kev ua haujlwm ntawm tes xws li teeb liab hloov pauv thiab lub koom haum spatial ntawm plasma daim nyias nyias.
Hauv qhov no, vim li cas cov membrane asymmetry yog ib qho tseem ceeb hauv cov cell membranes?
Yog vim li cas cell membrane yog asymmetric yog vim thaum cov proteins yog synthesized los ntawm preexisting daim nyias nyias , lawv muab tso rau hauv lub daim nyias nyias nyob rau hauv asymmetrical. Cov molecules los yog ions nyob rau hauv no diffusion dhau los ntawm lub daim nyias nyias los ntawm kev siv tshwj xeeb transmembrane thauj cov proteins.
Tsis tas li ntawd, vim li cas peb thiaj xav tau daim nyias nyias? Txhua lub cev muaj sia muaj ib lub cell daim nyias nyias , cov qauv semipermeable uas nyob ib puag ncig ntawm tes. Qhov no muaj peev xwm hloov tau yog tseem ceeb vim tias nws tso cai rau lub xov tooj ntawm tes kom muaj sia nyob hauv qhov chaw sib txawv, xws li thaum muab tso rau hauv dej ntev ntev.
Kuj nug, vim li cas membrane sidedness yog ib lub tswv yim tseem ceeb hauv cell biology?
A cell membrane tso cai rau qee yam khoom hla nws yooj yim dua li lwm tus. Nws yog tseem ceeb rau hlwb vim nws cia cov khoom tsim nyog rau hauv thiab khaws pov tseg. Vim li cas membrane sidedness yog ib lub tswv yim tseem ceeb hauv biology ? Tshawb nrhiav permeability nyob ntawm ob qho tib si semi permeable daim nyias nyias thiab tshwj xeeb thauj proteins.
Yuav ua li cas ua rau ib tug membrane protein nyob rau hauv lub lipid bilayer?
Lub cheeb tsam tsis muaj polar ntawm lub cell daim nyias nyias ua rau daim nyias nyias kom nyob twj ywm hauv daim nyias nyias . Lub polarity ntawm sab hauv thiab sab nrauv ua rau lawv hydrophilic. Yuav ua li cas ua rau ib tug membrane protein nyob rau hauv lub lipid bilayer ? Lub polarity ntawm cov proteins cov cheeb tsam sab nrauv thiab cov cheeb tsam uas tsis yog polar puab tuav lawv hauv bilayer.
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