Assertion: black mamba's venom | /r/MadeOf | lower percentages of proteins
Facets:
Source sentences:
text: In addition, the venom contains lower percentages of proteins from other families, including metalloproteinase, hyaluronidase, prokineticin, nerve growth factor, vascular endothelial growth factor, phospholipase A2, 5'-nucleotidase, and phosphodiesterase.