A schematic of the 5′ terminal of the fTNFA gene analyzed in this study. A partial fTNFA sequence of 1018 bp was sequenced in this study, including the PRR, the 5′-UTR, and part of exon 1. All the SNPs and the corresponding positions are indicated with lines. Gray box: exon 1. Black boxes: repeat regions. SNPs located in the exon were shaded.