The following molecule is formed by two amino acids: Identify the alpha carbons (using the numbers as shown) and the side chains for each amino acid in the molecule. 
Definitions:
Marginal Expenditure
The incremental cost associated with the purchase of an additional unit of a good or service.
Marginal Product
The increase in output that arises from an additional unit of input.
Marginal Revenue
The additional income generated from the sale of one more unit of a product or service.
Marginal Product
Marginal product is the additional output that is produced by adding one more unit of a specific input, holding all other inputs constant.
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