Enzymes have active sites where they come into contact with particular substrates. The catalytic properties of enzymes are a cyclic process. Once a substrate has come into contact with the active site of an enzyme, it is modified by the enzyme to form the end product.
1 Reducing saturated fat to no more than 5 to 6 percent of total calories. 2  For someone eating 2,000 calories a day thatâs about 11 to 13 grams of saturated fat. 3  Reducing the percent of calories from trans fat.
by Elizabeth Scherer. First, you need to know how many calories you should eat each day. Once you know this, you can determine how many grams of fat and saturated fat you can eat without exceeding your limits for fat. These limits are 25% to 35% of calories from fat and less than 7% of calories from saturated fat.nce you know this, you can determine how many grams of fat and saturated fat you can eat without exceeding your limits for fat. These limits are 25% to 35% of calories from fat and less than 7% of calories from saturated fat.