Troponin C type 2 (fast), or, TNNC2, is a human gene. Other names include: Troponin C, skeletal muscle. The encoded protein has an amino acid length of 160 and a mass of 18.1 kDa. Other isoforms may exist. Troponin C type 2 (fast) is a member of the Troponin C family. This gene shares homology with other species, including: Rat, Zebrafish, Frog, Chicken.