Qhov sib txawv tseem ceeb ntawm kinetochore thiab nonkinetochore microtubules yog tias kinetochore microtubules ncaj qha txuas rau kinetochore ntawm chromosomes thiab txav mus rau cov ncej thaum lub sij hawm mitosis thaum nonkinetochore microtubules tsis txuas nrog kinetochore ntawm chromosomes.
Kinetochore yog ib qho disk-puab cov qauv protein sib sau ua ke ntawm thaj tsam centromeric ntawm DNA. Kinetochore muab cov ntsiab lus tseem ceeb rau cov ntxaiv microtubules thaum lub sij hawm mitotic los yog meiotic faib kom rub cov chromosomes sib nrug. Yog li ntawd, kinetochore xyuas kom meej qhov kev faib tawm ntawm DNA rau cov ntxhais hlwb. Muaj ob hom microtubules li kinetochore microtubules thiab nonkinetochore microtubules. Kinetochore microtubules txuas nrog chromosomes thiab txav mus rau cov ncej. Nonkinetochore microtubules yog mitotic spindles uas tsis cuam tshuam nrog kinetochore ntawm chromosomes. Lawv koom nrog elongating lub cell thaum anaphase.
Kinetochore Microtubules yog dab tsi?
Microtubules yog cov khoom ntawm cytoskeleton. Lawv koom nrog hauv mitosis, cell motility, intracellular thauj thiab kev saib xyuas ntawm cov duab ntawm tes. Kinetochore microtubules yog ib hom microtubules uas txuas nrog lub kinetochore ntawm chromosomes thaum lub sij hawm mitosis. Lawv muaj peev xwm invading nuclear chaw. Thaum sib cais ntawm chromosomes hauv mitosis, chromosomes txav mus rau cov ncej vim muaj kev cuam tshuam nrog kinetochore microtubules. Yog li ntawd, kinetochore microtubules yog lub luag hauj lwm rau txav chromosomes mus rau qhov opposite xaus ntawm lub cell thaum lub sij hawm mitosis.
Daim duab 01: Kinetochore Microtubules
Nonkinetochore Microtubules yog dab tsi?
Nonkinetochore microtubules yog mitotic spindles uas tsis cuam tshuam nrog kinetochore ntawm chromosomes. Lawv tseem hu ua polar microtubules. Lawv tsis txuas nrog chromosomes thaum lub sij hawm mitosis. Cov microtubules no pom thiab cuam tshuam nrog cov nonkinetochore microtubules sib thooj los ntawm qhov sib txawv centrosomes los tsim cov mitotic spindles. Nonkinetochore microtubules yog lub luag haujlwm rau elongating lub cell thaum anaphase.
Daim duab 02: Nonkinetochore Microtubules
Ntxiv mus, nonkinetochore microtubules raug them. Lawv sib tshooj thiab thawb tawm tsam ib leeg, txav centrosomes sib nrug. Li no, cov microtubules no yog lub luag haujlwm rau thawb centrosomes sib nrug.
Dab tsi yog qhov zoo sib xws ntawm Kinetochore thiab Nonkinetochore Microtubules?
- Lawv yog ob hom microtubules ntawm cov hlwb.
- Ob lub kinetochore microtubules thiab nonkinetochore microtubules yog qhov tseem ceeb rau kev faib cell ua tiav.
Qhov txawv ntawm Kinetochore thiab Nonkinetochore Microtubules yog dab tsi?
Kinetochore microtubules yog microtubules uas txuas nrog kinetochore ntawm chromosomes thaum lub sij hawm mitosis. Nyob rau hauv sib piv, nonkinetochore microtubules yog microtubules uas tsis txuas nrog chromosomes thaum lub sij hawm mitosis. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kinetochore thiab nonkinetochore microtubules.
Ntxiv mus, kinetochore microtubules yog lub luag haujlwm rau kev txav chromosomes mus rau cov ncej txhawm rau faib cov chromosomes rau cov menyuam ntxhais. Txawm li cas los xij, nonkinetochore microtubules yog lub luag haujlwm rau thawb centrosomes sib nrug thiab cellular elongation. Tsis tas li ntawd, lwm qhov sib txawv ntawm kinetochore thiab nonkinetochore microtubules yog lawv lub luag haujlwm hauv cell elongation; nonkinetochore microtubules yog lub luag haujlwm rau cellular elongation thaum kinetochore microtubules tsis yog.
Cov hauv qab no infographic qhia txog qhov sib txawv ntawm kinetochore thiab nonkinetochore microtubules hauv daim ntawv tabular.
Summary – Kinetochore vs Nonkinetochore Microtubules
Kinetochore microtubules thiab nonkinetochore microtubules yog ob hom microtubules hauv ib lub xovtooj ntawm tes. Kinetochore microtubules ncaj qha cuam tshuam thiab txuas nrog kinetochore ntawm chromosomes. Lawv yog lub luag haujlwm rau kev sib cais ntawm chromosomes rau hauv cov menyuam ntxhais. Nonkinetochore microtubules tsis txuas rau kinetochore. Lawv cuam tshuam nrog chromosome caj npab thiab lwm yam nonkinetochore microtubules los ntawm cov centrosomes sib thooj. Nonkinetochore microtubules los ntawm cov ncej sib tshooj sib tshooj thiab thawb tawm tsam ib leeg, elongating lub cell. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kinetochore thiab nonkinetochore microtubules.
