Figure 1.

PtoCesA4 gene structure and the positions of common SNPs (minor allele frequencies > 0.10). All common SNPs are represented by dark spots; putative transcription factor binding sites around SNPs in the PtoCesA4 promoter were predicted and numbers above the promoter region indicate the positions of putative transcription factor binding sites in base pairs relative to the predicted transcription start site. (A) Zinc-binding domain. (B–I) Two transmembrane helices in the N-terminal region and six in the C-terminal region.