Involved in the biosynthesis of the cyanogenic glucosides linamarin and lotaustralin. Can use L-valine or L-isoleucine as substrate, but not L-leucine, L-phenylalanine, L-tyrosine, D-valine or D-isoleucine. L-valine + 2 O2 + 2 reduced [NADPH--hemoprotein reductase] = (E)-2-methylpropanal oxime + CO2 + 2 H(+) + 3 H2O + 2 oxidized [NADPH--hemoprotein reductase] Inhibited by tetcyclasis but not by 1-aminobenzotriazole (ABT). Expressed in the epidermis, the next two cortex cell layers, the endodermis and the pericycle of leaf petioles. Strong expression around the laticifers among the phloem cells and in parenchymatic cells between the protoxylem and the metaxylem cells. In the leaves, preferentially expressed in the mesophyll cells adjacent to the epidermis. The synthesis of cyanogenic glucosides is mainly in the top of the plant and then cyanogenic glucosides are transported basipetal in the plant to the tuber. Belongs to the cytochrome P450 family.