In resolving a longstanding dispute, the Food and Drug Administration has announced that it will rescind approval for three of the four arsenic drugs that had been used in animal feeds at the request of the companies that market them.he issue of arsenic in food has drawn increased public scrutiny since research last year by Consumer Reports found substantial arsenic levels in rice. Arsenic residue in rice often comes from the water used to grow it, and poultry feces are widely used as fertilizer for a variety of crops.
a net-like structure in the cytoplasm of animal cells (especially in those cells that produce secretions), stack of membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum. packaging products for shipping.
One interesting feature of the endoplasmic reticulum is that the rough and smooth endoplasmic reticulum can transform from one type to another. Their transformation is subject to the needs of the cell and especially the enzymatic needs. The transformation happens through the embedding of proteins.rotein Folding. The function of rough endoplasmic reticulum doesn't end there. The proteins that enter are further processed inside. Just like a two dimensional cardboard box is folded to make a box, the proteins are folded into the right three dimensional shapes and carbohydrates may be added.