The most crucial point in the show, she said, came when National Cattlemen's Beef Association spokesman Gary Weber " confessed " that at the time, some U . S . cattlemen were still feeding cattle-derived protein supplements to their herds.
22.
Allergens, which may be different for different individuals, combine with epithelial-derived proteins, forming haptens which bind with Langerhans cells in the mucosa, which in turn present the antigen on their surface to T lymphocytes, sensitizing them to that antigen and causing them to produce many specific clones.
23.
"Any sort of halfway measure, trying to pull the sheep out of the mix, is not going to work, " said John Stauber, author of a 1995 book that raised concerns about the cattle industry's use of animal-derived protein supplements in conjunction with bovine growth hormone, which is given to dairy cattle to boost milk production.
