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.
Tips. 1  If your recipe contains more than a half-teaspoon of soda, you might need to increase the quantity of acidity in the milk. 2  Plain white vinegar, apple cider vinegar and mild-flavored white wine or rice vinegar are all appropriate options. 3  You can also use milk soured this way as a substitute for buttermilk in recipes.