The thin filament consists of F-actin, troponin, tropomyosin, and nebulin. The thick filament is formed of myosin, titin and myosin binding protein C (MyBP-C).

Preston F. Gadson, Jr., Candace Rossignol, Judy McCoy, Thomas H. Rosenquist, Expression of Elastin, Smooth Muscle Alpha-Actin, and c-Jun as a Function of the Embryonic Lineage of Vascular Smooth ...

More information: Marine Maupérin et al, A feedback circuitry involving γ-actin, β-actin and nonmuscle myosin-2 A controls tight junction and apical cortex mechanics, Nature Communications (2025).

They found that when gamma-actin is absent, beta-actin, another form of actin, is produced in higher amounts, which is associated with an increase in a particular type of myosin.

The plant hormone auxin drives growth in young plant cells through the activity of proteins known as transcription factors. Older cells “tell” auxin to be quiet by ensuring that these transcription ...