Muscle contraction yog li tshwm sim los ntawm kev sib cuam tshuam ntawm actin thiab myosin filaments uas ua rau lawv txav mus rau ib leeg. Lub hauv paus molecular rau qhov kev sib cuam tshuam no yog kev khi ntawm myosin rau actin filaments, tso cai rau myosin ua haujlwm raws li lub cev muaj zog uas tsav filament zawv zawg.
Dab tsi ua rau muaj kev cuam tshuam ntawm myosin thiab actin hauv cov leeg?
Nyob rau hauv cov leeg, projections ntawm myosin filaments, lub thiaj li hu ua myosin taub hau los yog cross-bridges, cuam tshuam nrog cov actin filaments nyob ze thiab, nyob rau hauv ib tug mechanism powered los ntawm ATP- hydrolysis, lawv txav cov actin filaments yav dhau los lawv nyob rau hauv ib hom cyclic rowing txiav txim los tsim cov macroscopic muscular txav uas peb yog …
nws hu li cas thaum myosin cuam tshuam nrog actin?
Yog tias qhov concentration ntawm ions hauv cov tshuaj yog tsawg, myosin molecules aggregate rau hauv filaments. Raws li myosin thiab actin cuam tshuam nyob rau hauv lub xub ntiag ntawm ATP, lawv tsim ib tug nruj compact gel loj; txheej txheem hu ua superprecipitation.
Dab tsi cuam tshuam kev cuam tshuam ntawm actin thiab myosin?
1 Tropomyosin . TM tswj cov leeg nqaij leeg los ntawm kev thaiv cov myosin khi qhov chaw ntawm actin, tiv thaiv kev sib cuam tshuam ntawm actin-myosin.
myosin taug kev raws li actin li cas?
Myosin Heads Taug kev raws Actin Filaments
Vim tias cov myosin molecules raug khi rau hauv daim npog, lawv txav tsis tau; Yog li txhua lub zog tsim los ntawm kev sib cuam tshuam ntawm myosin taub hau nrog actin filaments rog cov filaments kom txav mus raws myosin (Daim duab 18-22a).
