Final answer:
Experimental evidence, such as X-ray crystallography, Mass spectrometry, NMR spectroscopy, and Electrophoresis, support the contention that the instructions for the higher levels of protein structure reside in the amino acid sequence.
Step-by-step explanation:
The function of a protein is specified by its amino acid sequence, which is supported by experimental evidence such as X-ray crystallography, Mass spectrometry, NMR spectroscopy, and Electrophoresis.
A. X-ray crystallography can provide the 3D structure of a protein, allowing us to understand how the amino acid sequence determines its higher levels of structure.
B. Mass spectrometry can determine the mass and composition of a protein, providing insights into its function.
C. NMR spectroscopy can analyze the interactions between different amino acids in a protein, revealing how the sequence influences its folding and function.
D. Electrophoresis can separate proteins based on their size and charge, giving us information about their composition and structure.