Biochemical composition of venom of insects that frequently sting humans. a (as cited by)In contrast to pharmacological similarities of insect venoms, their biochemical structure differ remarkably among the varies taxa. The phospholipases derived from honey bees, yellow jackets, and fire ants have very different molecular weights: 16,000 for bees , 30,000 to 37,000 for yellow jackets and 28.000 in the form of tow roughly equal subunits for fire ants.