PROSTAGLANDIN H SYNTHASE-2;PROSTAGLANDIN H SYNTHASE 2 HUMAN;PROSTAGLANDIN H SYNTHASE 2 (HUMAN RECOMBINANT);PROSTAGLANDIN H SYNTHASE 2 (OVINE);PROSTAGLANDIN SYNTHASE;PROSTAGLANDIN SYNTHASE, RAM SEMINAL VESICLES;PROSTOGLANDIN H SYNTHASE-2 (SHEEP);PGHS-2