Transformation of arachidonic acid into thromboxane B2 by the homogenates of activated macrophages.

The homogenates of activated macrophages obtained from liquid paraffin-injected guinea pig peritoneum were incubated with [14C]arachidonic acid or with radioactive prostaglandin endoperoside [14C]prostaglandin H2. The major radioactive metabolite in both cases was thromboxane B2, which was identified by NaBH4 reduction, rechromatography and autoradiography.