Assertion: pit viper's venom | /r/MadeOf | protein
Facets:
Source sentences:
text: The venom of a copperhead contains a protein called contortrostatin, discovered through the research of University of Southern California chemistry professor Frank Markland.
text: Venom of Southern Copperhead, one most poisonous snake, has been found to contain a protein that halts the growth of cancer cells and stops the migration of tumors.
text: Crotalus atrox, the venom of which contains proteins allowing the snake to track down bitten prey