This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Method of choice for protein identification 
Select and explain. 
A. Edman technique, B. Mass spectrometry, C. Sanger technique, D. 2-D electrophoresis
B: Mass spectrometry
Answer: B: Mass spectrometry 
Explanation: While the requisite amino acid sequence information can be obtained using the Edman technique, today mass spectrometry (MS) has emerged as the method of choice for protein identification.
Ref: Harper’s illustrated biochemistry. 30th edition page no: 30