Protein phosphorylation is a reversible post-translational modification of proteins. In eukaryotes, protein phosphorylation functions in cell signaling, gene expression, and differentiation. It is also involved in DNA replication during the cell cycle, and the mechanisms that cope with stress-induced replication blocks.
Cake Doughnut. A single glazed chocolate cake doughnut that is around 3 3/4 inches in diameter can have close to 250 calories. Depending on the recipe, some varieties -- like chocolate-frosted chocolate cake doughnuts -- can have as many as 370 calories.
A slice of chocolate sheet cake with chocolate frosting, which is equal to about 4 ounces, contains 537 calories. A slice of yellow sheet cake with vanilla frosting has 424 calories. A serving of chocolate sheet cake with chocolate frosting contains 27.67 grams of fat, of which 8.1 grams are saturated. Yellow cake contains 16.44 grams of fat per serving, of which 2.68 grams are saturated.