Expressed in roots, leaves, flowers and siliques. By wounding. Belongs to the cytochrome P450 family. In cv. Columbia, CYP74B2 (AC B3LF83) DNA sequence contains a 10-bp deletion that leads to a shorter N-terminus compared to typical other CYP74B subfamily members, and CYP74B2 is thought to be a non-functional enzyme. Functional alleles, with full N-terminus are found in cv. Landsberg erecta and cv. Wassilewskija (AC Q9ZSY9).