Structure of white spruce genomic DNA of BAC clones PGB02 and PGB04. The position of the target genes 3CAR and CYP720B4 is indicated. Red and yellow bars represent repeated segments and segments with similarity to DNA transposons, respectively. Transposable elements were identified with the RepeatMasker using the viridiplantae section of the RepBase Update database. EcIS10, E. coli individual insertion sequence (IS) of the bacterial transposon Tn10; CSRE, conifer specific repeat element; LB/RB left and right border of pINDIGO; arrows in PGB04 indicate local putative segment duplications. The scale bar represents 10 kbp. (p) pseudogene, based on the accumulation of deleterious mutations and the absence of transcript with >90% identity.