Amino acid analysis of two globular protein samples yields identical composition per mole. Which one of the following characteristics is necessarily identical for the two proteins?
Disulphide bonds
Primary structure
Molecular mass
Three-dimensional structure
The molecular mass of a protein can be predicted on the basis of the amino acid composition. Since we are given that the two amino acids from globular proteins have identical compositions per mole, we can conclude that the molecular mass of the proteins will also be identical.
Therefore, the correct answer is Option (C)
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