Fig. 2. Binding of N-terminal truncated TnT fragments to Tm.
N-terminal serially truncated cardiac TnT fragments (Fig. 1) were tested for Tm-binding affinity in ELISA protein binding experiments. The results showed that the deletion of the N-terminal variable region (McTnT-ND72) alone did not significantly affect Tm-binding whereas further deletion of 20 amino acids in the conserved middle region (McTnT-ND92) produced a detectable decrease in Tm-binding affinity. Extending the deletion to remove 39 more amino acids encoded by exon 10 (McTnT-ND130) resulted in a major decrease in Tm-binding affinity.