Digestion and Absorption of Protein (continued) Free amino acids absorbed by cotransport with Na + . Dipeptides and tripeptides transported by secondary active transport using a H + gradient to transport them into the cytoplasm. Hydrolyzed into free amino acids and then secreted into the blood. Insert fig.
Substitute an equal amount of sour cream for milk in a recipe. Examine the texture of the sour cream. Adjust the level of shortening or butter in the recipe. Reduce the shortening by 1/2 cup for thick or heavy sour cream or 1/3 cup for thin or light sour cream.
Use yogurt in place of oil. You can use buttermilk, yogurt, sour cream or mayonnaise instead of oil. Mayonnaise may sound like a stretch, but it comes closest to oil and, surprisingly, does not alter the taste of the cake. Sour cream often substitutes for mayonnaise, so you can also use it in a cake.