Molecular structure and functional regulatory domains of grape CYP736B. A representative genomic DNA sequence from the PD- resistant selection 9621-67 was used as an example. The 5' upstream region, intron and 3' down-stream region are in lower case, exons are in upper case. Several regulatory elements were boxed with highlight in yellow in the 5'UTR-promoter region. The DNA fragment in red within the 5'UTR-promoter region was not present in PD- susceptible selection 9621-94. The transcription initiation regions are highlighted with red and the specific transcription start sites (TSS1, TSS2, and TSS3) in green are indicated with stem-arrows to indicate the direction of transcription. Three Poly(A) signal motifs were boxed with highlight in yellow and specific poly(A) sites, poly(A)1, poly(A)2 and poly(A)3, were highlighted in green and indicated by vertical arrows at 3'UTR. The DNA fragment in red at 3'UTR was not present in PD- resistant plants. The translation start codon was marked in bold and stop codon was marked with star (*). The donor site (gt) and receptor site (ag) for pre-mRNA splicing are marked in blue.