+ wishlist Human Insulin by Tryptic Transpeptidations of Porcine Insulin and Biosynthetic Precursors [9780746200599] Add to Cart The item has been added Author: J. Markusse Human Insulin by Tryptic Transpeptidations of Porcine Insulin and Biosynthetic Precursors [9780746200599] Buy More - Save More. Below are the available bulk discount rates for each individual item when you purchase a certain amount Quantity Price Savings 25 - 49 4% 50 - 99 5% 100+ 6% List Price As Low as $54.99 Format: Paperback