In other tissues and animal species, numerous hepoxilins form but the hepoxilin synthase activity responsible for their formation is variable.  (Hepoxilin A3 [8R/S-hydroxy-11,12-epoxy-5Z,9E,14Z-eicosatrienoic acid] and hepoxilin B3 [10R/S-hydroxy-11,12-epxoy-5Z,8Z,14Z-eicosatrienoic acid] refer to a mixture of Diastereomers and⁄or Enantiomers derived from arachidonic acid.)  Cultured RINm5F rat Insulinoma cells convert 12(S)-HpETE to hepoxilin A3 in a reaction that is completely dependent on, and co-localizes with, the cells' leukocyte type 12-LOX; furthermore, recombinant rat and porcine leukocyte type 12-LOX as well as human platelet type 12-LOX metabolize 12(S)-HpETE to hepoxylin A3.  However, transfection of HEK293 human embryonic kidney cells with each of the 6 rat lipoxygenases, including rat eLOX3, found that hepoxilin B3 production required eLOX3; furthermore, the development of inflammation-induced tactile pain hypersensitivity (hyperesthesia; tactile Allodynia) in rats required eLOX3-dependent production of hepoxilin B3 by spinal tissue.  Thus, the production of hepoxilins from 12(S)-HpETE may result from the intrinsic activity of platelet or leukocyte type 12-LOX's, require eLOX3, or even result from 12(S)-HpETE spontaneous (and perhaps artefactual) decomposition during isolation.  The majority of reports on hepoxilin formation have not defined the pathways evolved.