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Human TnI isoform genes and tissue-specific expression
| Protein isoforms | Slow Skeletal Muscle TnI |
Fast Skeletal Muscle TnI |
Cardiac TnI |
|---|---|---|---|
| Gene | TNNI1 | TNNI2 | TNNI3 |
| Chromosomal Location | 1q31.3 | 11p15.5 | 19q13.4 |
| Number of Exons | 9 | 8 | 8 |
| Number of Amino Acids | 187 | 182 | 210 |
| Molecular Weight (kDa) | 21.7 | 21.3 | 24.0 |
| Isoelectric Point | 9.59 | 8.74 | 9.87 |
| Tissue Specificity | Slow-twitch fibers Embryonic heart |
Fast-twitch fibers | Adult heart |
