Troponin I (cTnI) is 1 of 3 subunits, along with troponin C (TnC) and troponin T (TnT) of troponin complex found in cardiac muscle. cTnI binds to actin in thin myofilaments to hold the troponin-tropomyosin complex in place. Phosphorylation of cardiac isoform of TnI at serines 22,23 in the unique amino-terminal end molecule decreases the calcium sensitivity of the sarcomere, promotes calcium dissociation from troponin C and by extension enhances rates of cross-bridge cycling and diastolic relaxation. In addition, studies using reconstituted fibers and mutational analysis have shown that PKC phosphorylation of TnI (largely at Ser43) inhibits the actin-cross bridge reaction and reduces the Ca++ dependent actomyosin ATPase rate as well as the calcium sensitivity of force generation. Phosphorylation at Thr144 (mediated by several PKC isoforms) reduces maximal tension development and cross-bridge cycling rates. Importantly, changes in the phosphorylation at each of these sites have been shown to be stage-specific with regard to cardiac disease progression. Troponin I Antibody is ideal for researchers interested in cancer research.
Anti-Troponin (cardiac) Antibody is stored as a 100 μl neat serum. It is suitable for Western Blots and is specific for the ~25 kDa cardiac troponin I protein. Specific conditions for reactivity should be optimized by the end user.
Type: Primary
Antigen: TNNI3
Clonality: Polyclonal
Clone:
Conjugation:
Epitope:
Host: Rabbit
Isotype:
Reactivity:
