A factor that does not change in an experiment is the A. Controlled variable
B. Data
C. Inconstant
D. Independent variable

this protocol provides a detailed procedure for agarose-based ip to purify and enrich the protein of interest.

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.