Assertion: copperhead's venom | /r/CapableOf | hold protein
Facets:
Source sentences:
text: The venom of the southern copperhead has been found to hold a protein called "contortrostatin" that halts the growth of cancer cells in mice and also stops the migration of the tumors to other sites.
text: The venom of the southern copperhead has been found to hold a protein called “contortrostatin” that halts the growth of cancer cells in mice.
text: The venom of the southern copperhead has been found to hold a protein called "contortrostatin" that halts the growth of cancer cells in mice and also stops the migration of the tumors to other sites.