Interspersed within the exons are introns, regions of non-coding DNA. Introns must be removed from the initial transcript of mRNA before the final mature transcript is sent to the ribosome for translation into protein. This removal is done in a coimplex protein structure called the spliceosome.The spliceosome splices out the non-coding introns from the primary mRNA transcript, and stiches the exons back together into the mature mRNA transcript.he spliceosome is a complex of small nuclear RNA (snRNA) and small nuclear protein (snRNP) molecules, snRNAs and snRNPs.
Calorie Breakdown. A slice of fast-food cheese pizza weighing approximately 103 g contains 272 calories, 33.56 g of carbohydrate, 12.27 g of protein, 9.8 g of fat, 4.35 g of saturated fat, 1.8 g of fiber, 551 mg of sodium and 22 mg of cholesterol, notes the U.S. Department of Agriculture's National Nutrient Database.
In fact, when it comes to sodium, eating one slice of the Whole Foodsâ bread is like eating 22 potato chips. Sodium levels also vary widely in white breads. Pepperidge Farmâs Farmhouse Hearty White Bread has 70 percent more sodium per 100 grams than Whole Foodsâ 365 Everyday Value Classic White Bread. One slice of the Pepperidge Farm bread has as much sodium as 21 potato chips.