Taber's Medical Dictionary
troponin
(trō′pŏ-nĭn )
To hear audio pronunciation of this topic, purchase a subscription or log in.ABBR: Tn An inhibitory protein in muscle fibers. The action potential at the sarcolemma causes the sarcoplasmic reticulum to release calcium ions, which bond to troponin and shift tropomyosin away from the myosin-binding sites of actin, permitting contraction.
SEE: muscle for illus
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Citation
Venes, Donald, editor. "Troponin." Taber's Medical Dictionary, 25th ed., F.A. Davis Company, 2025. Taber's Online, www.tabers.com/tabersonline/view/Tabers-Dictionary/767624/0/troponin.
Troponin. In: Venes DD, ed. Taber's Medical Dictionary. F.A. Davis Company; 2025. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/767624/0/troponin. Accessed April 24, 2026.
Troponin. (2025). In Venes, D. (Ed.), Taber's Medical Dictionary (25th ed.). F.A. Davis Company. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/767624/0/troponin
Troponin [Internet]. In: Venes DD, editors. Taber's Medical Dictionary. F.A. Davis Company; 2025. [cited 2026 April 24]. Available from: https://www.tabers.com/tabersonline/view/Tabers-Dictionary/767624/0/troponin.
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