Lipoxygenase that metabolizes linoleic and alpha-linolenic acids to 13S-hydroperoxy fatty acids. (9Z,12Z)-octadecadienoate + O2 = (13S)-hydroperoxy-(9Z,11E)-octadecadienoate Three His residues, the carboxyl oxygen of the C-terminal Ile or Val residue, and a fifth residue, usually Asn, ligate the metal, which binds water to form a catalytic base Mn(2+)OH(2) for hydrogen abstraction. kcat is 157 sec(-1) for linoleic acid (at pH 7.0 and 22 degrees Celsius). Optimum pH is 7.0. Optimum temperature is 37 degrees Celsius (PubMed:34033194). Optimum temperature is 35 degrees Celsius (Ref.3). The oxidation of primary substrates may lead to co-oxidation of other molecules (Ref.2, PubMed:34033194). Cleaves piperine to piperonal and 3,4-methylenedioxycinnamaldehyde (PubMed:34033194). Converts (+)-valencene to (+)-nootkatone, alpha-nootkatol and beta-nootkatol (PubMed:22264428, Ref.2, Ref.3). Converts trans-anethole to p-methoxybenzaldehyde (PubMed:34033194). Converts trans-isomethyleugenol to veratraldehyde (PubMed:34033194). Converts alpha-methylstyrene to acetophenone (PubMed:34033194). Belongs to the lipoxygenase family. Truncated N-terminus. This sequence differs from that shown at positions 419, 539, 548-551, and 873.