Figure 3. Gene structure and detected single nucleotide polymorphisms within the candidate genes. The gene structure and the detected SNPs within TNNT1 (9,366 bp), RDH13 (16,985 bp), and TFPT (7,644 bp) are shown. The positions of the SNPs are indicated by arrows. Translated exons are shown as solid boxes and numbered with Arabic numerals. Untranslated regions of exons are shown as open boxes.