Assume that you are getting ready to do an amino acid sequencing experiment on a protein containing 100 amino acids, and amino acid analysis shows the following data:

Which of the chemicals or enzymes normally used for cutting proteins into fragments would be the least useful to you?

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Amino Acid Ala Arg Asn Asp Cys Gln Glu Gly His Ile Leu Lys Met Phe Pro Ser Thr Trp Tyr Val Number of Residues 7 23.7 5.6 4.1 4.7 4.5 2.2 3.7 3.7 1.1 1.7 11.4 0 2.4 4.5 8.2 4.7 0 2.0 5.1