Sterols yog qhov tseem ceeb hauv txhua lub cell eukaryotic. Sterols txo cov membrane fluidity thiab permeability, thiab ua kom daim nyias nyias rigidity thiab lub zog.
sterols pab tswj cov kua dej ntawm daim nyias nyias li cas?
Cov roj (cholesterol) ua raws li kev tswj hwm bidirectional ntawm membrane fluidity vim hais tias ntawm kub kub, nws stabilizes daim nyias nyias thiab nce nws melting point, whereas ntawm qis kub nws intercalates ntawm phospholipids thiab tiv thaiv. lawv los ntawm pawg ua ke thiab khov kho.
Pob sterols tuav fluidity?
Sterols, thib peb lipid chav kawm, kuj tswj cov txheej txheem lom neeg thiab txhawb nqa cov qauv ntawm cov cell membranes uas lawv suav tias yog cov khoom siv membrane [2]. … Lawv tau raug npaj ua cov molecules tseem ceeb los tswj cov membranes hauv lub xeev ntawm fluidity txaus rau kev ua haujlwm.
Lub luag haujlwm ntawm sterol hauv cell membrane yog dab tsi?
Lub luag haujlwm ntawm sterol hauv cell membrane yog kom muaj kev ruaj khov. Steroles yog steroids nrog 8-10 carbon ntev aliphatic sab saw ntawm carbon 17 thiab tsawg kawg yog ib qho cawv hydroxyl. Cov roj (cholesterol) (C27H45OH) yog ib qho sterol uas muaj nyob hauv ntau lub cell membranes.
Yam dab tsi cuam tshuam rau daim nyias nyias?
Tam sim no, cia peb saib cov yam tseem ceeb uas cuam tshuam cov membrane fluidity
- Factor 1: Qhov ntev ntawm fatty acid tail. Qhov ntev ntawm fatty acid Tail cuam tshuamfluidity ntawm daim nyias nyias. …
- Factor 2: Kub. …
- Factor 3: Cov roj (cholesterol) cov ntsiab lus ntawm bilayer. …
- Factor 4: Lub degree ntawm saturation ntawm fatty acids tails.
