Plasmids constructed in this work. In each plasmid illustration, relevant features for this work, such as endonuclease recognition sites and primer binding sites (thin arrows), are shown. Some elements of the original plasmid (pBluescript SK-) were kept and shown in gray. Plasmid pBS-gCyp61 harbors the genomic version of the CYP61 gene from X. dendrorhous that was PCR-amplified with primers CYP61up2.F and Cyp61dw2.R. Red thick arrows along with a number represent the nine exons of the CYP61 gene. Plasmids pBS-Cyp61/Hyg and pBS-Cyp61/Zeo were built by inserting the hygromycin B (HygR, in green) and zeocin (ZeoR, in violet) resistance expression cassettes, respectively, at the EcoRV site of plasmid pBS-gCyp61. To linearize the plasmids for transformation purposes, pBS-Cyp61/Hyg and pBS-Cyp61/Zeo were digested with XbaI.