Vitis vinifera β-tubulin genes first intron size: comparison between nucleotide sequence information ('Pinot Noir' PN 40024) retrieved from V. vinifera Genome Data Base (Genoscope 12X—Assembly version 12 Feb 2010) and experimental data obtained with CE-TBP. The first column on the left reports the schematic representation of the genomic organization of the β-tubulin genes in Vitis. Introns, represented by lines, are interspersed within exons, represented by black boxes. The last columns on the right report the size of the amplified CE-TBP fragments and deduced 1st introns length, obtained from cv. PN5 ('Pinot Noir' 5V17). Chromosome number (Chr), strand, nucleotide number (left and right border) and the length in base pairs of the 1st exon and 1st intron are reported for each entry. Peak size, in base pair for each β-tubulin gene, is detecdet by the CE-TBP 1st intron method; estimated size of the 1st intron is calculated by subtracting 305 bp from the Peak size; nd not determined.