Answer:
Amino acid sequence of the protein.
Explanation:
Glycoproteins are the proteins that contain some portion of carbohydarte attached with the protein surface. The core of polysaccharides and oligosaccharides are present in the glycoprotein.
Various techniques can be used to determine the nature of the glycoprotein like right side out vesicle or inside out vesicle. The amino acid sequence of the protein is need not to be determined to characterize the carbohydrate portion of glycoprotein as carbohydrate do not contain the amino acid sequence.
Thus, the correct answer is option (c).