Qhov sib txawv tseem ceeb ntawm actin filaments thiab microtubules yog cov actin filaments yog cov tsawg tshaj plaws ntawm filamentous proteins ua los ntawm actin thaum microtubules yog hom loj tshaj plaws ntawm filamentous proteins ua los ntawm tubulin.
Lub cytoskeleton yog lub cev pob txha ntawm lub cell thiab yog lub luag haujlwm muab cov qauv thiab kev txhawb nqa rau lub cell. Nws yog ib qho tseem ceeb ntawm cov cytosol ntawm cytoplasm. Nyob rau hauv cov tsiaj hlwb, cytoskeleton yog tsim los ntawm peb lub ntsiab proteins: microfilaments, microtubules thiab intermediate filaments.
Actin Filaments yog dab tsi?
Actin filaments, tseem hu ua microfilaments, yog qhov nqaim tshaj plaws protein filaments pom hauv cytoskeleton. Lawv ua los ntawm cov protein hu ua actin. Lawv txoj kab uas hla yog li 6 nm. Lawv tau teem caij zoo li cov hlua khi ntev. Ntxiv mus, actin filaments muaj ob qhov sib txawv ntawm qhov kawg, uas yog ntxiv thiab rho tawm xaus. Actin filaments swb raws lwm hom filaments hu ua myosin hauv cov leeg nqaij. Yog li ntawd, hauv cov leeg nqaij, ob qho tib si actin filaments thiab myosin daim ntawv sarcomeres, uas yog ib qho tseem ceeb rau cov leeg nqaij contraction.
Daim duab 01: Actin Filaments
Ntxiv rau nws lub luag haujlwm hauv cov leeg nqaij, actin filaments kuj ua haujlwm rau ntau lub luag haujlwm tseem ceeb hauv cell. Hauv cov tsiaj cell faib, ib lub nplhaib ua los ntawm actin thiab myosin pinches lub cell sib nrug los tsim ob lub hlwb tshiab. Tsis tas li ntawd, ib lub network ntawm actin filaments nyob hauv qab ntawm lub cell cortex muab cov duab thiab qauv rau lub cell.
Microtubules yog dab tsi?
Microtubules yog cov protein ntau tshaj plaws hauv cov cytoskeleton. Lawv tau ua los ntawm cov protein hu ua tubulin. Tubulin proteins muaj ob subunits li alpha-tubulin thiab beta-tubulin. Cov protein no subunits hlua ua ke thiab tsim ntev protofilaments. Kaum peb lub protofilaments los ze zog thiab npaj los tsim ib lub hollow straw zoo li qauv, uas yog ib tug microtubule. Lawv txoj kab uas hla yog li 25 nm. Microtubules tuaj yeem loj hlob thiab ntsws los ntawm kev sib ntxiv lossis tshem tawm ntawm tubulin proteins. Ob qhov kawg ntawm microtubule yog lub npe hu ua qhov ntxiv kawg thiab rho tawm kawg.
Daim duab 02: Microtubules
Yeej, microtubules muab lub zog rau lub cell. Tsis tas li ntawd, microtubules pab lub cell tiv thaiv compression rog. Ntxiv mus, lawv sib sau ua ke rau hauv cov qauv hu ua spindle thaum lub sij hawm faib cell.
Dab tsi zoo sib xws ntawm Actin Filaments thiab Microtubules?
- Actin filaments thiab microtubules yog ob ntawm peb lub ntsiab cytoskeletal Cheebtsam.
- Lawv yog tsim los ntawm cov proteins uas muaj filamentous.
- Lawv koom nrog muab kev txhawb nqa tshuab rau ntawm tes.
- Ob qho tib si actin filaments thiab microtubules muaj ntxiv thiab rho tawm xaus, yog li ob qho tib si actin filaments thiab microtubules yog polar.
- Lawv tuaj yeem loj hlob thiab ntsws sai sai los ntawm kev ntxiv lossis tshem tawm cov proteins monomer.
Qhov txawv ntawm Actin Filaments thiab Microtubules yog dab tsi?
Actin filaments thiab microtubules yog ob hom protein fibers pom nyob rau hauv cytoskeleton. Actin filaments yog cov filaments tsawg tshaj plaws uas ua los ntawm actin proteins. Microtubules yog cov filaments loj tshaj plaws ua los ntawm tubulin proteins. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm actin filaments thiab microtubules. Ntxiv mus, actin filaments yog nyias thiab hloov tau, thaum microtubules yog tuab thiab tawv. Tsis tas li ntawd, actin filaments yog cov khoom rods, thaum microtubules yog hollow straw zoo li hlab.
Cov hauv qab no infographic qhia ntau qhov kev sib piv ntsig txog qhov sib txawv ntawm actin filaments thiab microtubules.
Summary – Actin Filaments vs Microtubules
Lub cytoskeleton ntawm ib lub xovtooj ntawm tes muaj microtubules, actin filaments, thiab nruab nrab filaments. Microtubules yog qhov loj tshaj plaws ntawm peb hom cytoskeletal fibers. Lawv yog tsim los ntawm tubulin protein filaments. Hauv qhov sib piv, actin filaments yog qhov tsawg tshaj plaws, thiab lawv tau tsim los ntawm actin protein filaments. Actin filaments muaj ob-stranded lattice, thiab lawv yog nyias thiab hloov tau cov protein filaments. Microtubules muaj qhov hollow, kaum peb-stranded lattice thiab lawv yog thicker thiab ntau stiffer. Yog li, qhov no yog cov ntsiab lus ntawm qhov sib txawv ntawm actin filaments thiab microtubules.
