Troponin I
From Wikipedia, the free encyclopedia
Troponin I is a part of the troponin complex. It binds to actin in thin myofilaments to hold the troponin-tropomyosin complex in place.
The tissue specific subtypes are:
- Slow-twitch skeletal muscle isoform troponin I, TNNI1 (1q31.3, 191042)
- Fast-twitch skeletal muscle isoform troponin I, TNNI2 (11p15.5, 191043)
- Cardiac troponin I, TNNI3 (19q13.4, 191044)
[edit] External links
skeletal muscle/general: epimysium, fascicle, perimysium, endomysium, muscle fiber, myofibril
sarcomere (a, i, and h bands; z and m lines), myofilaments (thin filament/actin, thick filament/myosin, elastic filament/titin), tropomyosin, troponin (T, C, I)
neuromuscular junction, intrafusal muscle fiber, extrafusal muscle fiber, motor unit, muscle spindle, sliding filament mechanism
myoblast, satellite cells, sarcoplasm, sarcolemma, sarcoplasmic reticulum, T-tubule
