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TNNI1

troponin I type 1 (skeletal, slow)

Troponin proteins associate with tropomyosin and regulate the calcium sensitivity of the myofibril contractile apparatus of striated muscles. Troponin I (TnI), along with troponin T (TnT) and troponin C (TnC), is one of 3 subunits that form the troponin complex of the thin filaments of striated muscle. TnI is the inhibitory subunit; blocking actin-myosin interactions and thereby mediating striated muscle relaxation. The TnI subfamily contains three genes: TnI-skeletal-fast-twitch, TnI-skeletal-slow-twitch, and TnI-cardiac. The TnI-fast and TnI-slow genes are expressed in fast-twitch and slow-twitch skeletal muscle fibers, respectively, while the TnI-cardiac gene is expressed exclusively in cardiac muscle tissue. This gene encodes the Troponin-I-skeletal-slow-twitch protein. This gene is expressed in cardiac and skeletal muscle during early development but is restricted to slow-twitch skeletal muscle fibers in adults. The encoded protein prevents muscle contraction by inhibiting calcium-mediated conformational changes in actin-myosin complexes.

Gene Name: troponin I type 1 (skeletal, slow)
Synonyms: TNNI1, Troponin I, skeletal, slow, SSTNI, TNN1
Target Sequences: NM_003281 NP_003272.3 P19237

Publications (2)

1
Large increases in plasma fast skeletal muscle troponin I after whole-body eccentric exercises. Large increases in plasma fast skeletal muscle troponin I after whole-body eccentric exercises. Journal of science and medicine in sport. 2020 August;23:776-781. [Full Text Article] [PubMed:32067915]
2
Elevation of fast but not slow troponin I in the circulation of patients with Becker and Duchenne muscular dystrophy. Benjamin L Barthel, Dan Cox, Marissa Barbieri, Michael Ziemba, Volker Straub, Eric P Hoffman, Alan J Russell. Muscle & nerve. 2021 Jul;;64:43-49. [Full Text Article] [PubMed:33683712] [PMC:PMC8362156]

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Proteins (11)
Over-Expression Lysate (2)
Recombinant (9)
TNNI1 (11)
No (11)
10His-DDK(Flag), N-terminus + Myc, C-terminus (1)
6His, N-terminus (1)
DDK,C-terminus (1)
GST (1)
His (3)
His, N-Terminal (1)
Myc-DDK (Flag) (3)
Human (7)
Mouse (2)
Rat (1)
293T Cells (1)
E. coli (6)
HEK 293 Cells (2)
Sf9 Cells (1)
Wheat Germ Extract (1)
Purified (3)
TNNI1 Protein - Recombinant Troponin I Type 1, Slow Skeletal By SDS-PAGE
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E. coli
His
23.2 kDa
10 µg/$271; 50 µg/$382; 100 µg/$610; 200 µg/$762; 1 mg/$1,817; 500 µg/$1,378; 5 mg/$2,775; 2 mg/$1,998
TNNI1 Protein
Select
E. coli
6His, N-terminus
23.2 kDa
10 µg/$275; 50 µg/$402; 100 µg/$642; 200 µg/$802; 1 mg/$1,876; 500 µg/$1,430; 5 mg/$2,838; 2 mg/$2,060
TNNI1 Protein
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E. coli
His
100 µg/$361; 500 µg/$739; 20 µg/$261
TNNI1 Protein - Purified recombinant protein TNNI1 was analyzed by SDS-PAGE gel and Coomassie Blue Staining
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HEK 293 Cells
Myc-DDK (Flag)
21.5 kDa
20 µg/$1,107
TNNI1 Protein - Recombinant Troponin I Type 1, Slow Skeletal By SDS-PAGE
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E. coli
His
23.2 kDa
10 µg/$267; 50 µg/$352; 100 µg/$562; 200 µg/$702; 1 mg/$1,723; 500 µg/$1,298; 5 mg/$2,673; 2 mg/$1,900
TNNI1 Protein - 12.5% SDS-PAGE of human TNNI1 stained with Coomassie Blue
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Wheat Germ Extract
GST
46.31 kDa
10 µg/$479; 25 µg/$670
TNNI1 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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HEK 293 Cells
Myc-DDK (Flag)
21.5 kDa
100 µg/$494
TNNI1 Protein - (Tris-Glycine gel) Discontinuous SDS-PAGE (reduced) with 5% enrichment gel and 15% separation gel.
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E. coli
10His-DDK(Flag), N-terminus + Myc, C-terminus
29.6 kDa
20 µg/$405; 1 mg/$1,679; 100 µg/$598
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E. coli
His, N-Terminal
21.5 kDa
50 µg/$419
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Sf9 Cells
DDK,C-terminus
21.5 kDa
20 µg/$677
TNNI1 Protein - Western validation with an anti-DDK antibody * L: Control HEK293 lysate R: Over-expression lysate
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293T Cells
Myc-DDK (Flag)
21.5 kDa
20 µg/$150
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For RESEARCH USE ONLY. Intended for use by laboratory professionals. Not intended for human diagnostic or therapeutic purposes.

The data on this page has been compiled from LifeSpan internal sources, the National Center for Biotechnology Information (NCBI), and The Universal Protein Resource (UniProt).