Free amino acid or within protein amino acid?

Hello,

I'd like to ask if the AminoTac will assay only free amino acids in my sample, or amino acids that are bound in a peptide chain as well. Meaning, if I only want to assay free amino acids, should I centrifuge out my whole protein as well?

Thanks for any information you can provide.

Sincerely,

Inderpreet Jalli, PhD Candidate