Representative mass spectrometry data. (A) AL κ light chain amyloidosis showing the top 15 spectra. Mass spectrometry shows large spectra for serum amyloid P-component, apolipoprotein E, and immunoglobulin κ V-I region and κ-constant region. (B) LECT-2 amyloidosis showing large spectra for serum amyloid P-component, apolipoprotein E, and leukocyte cell derived chemotaxin-2. The probability number (> 95% is highlighted by green, 80%-94% by yellow) indicates essentially the percent homology between peptides detected in the specimens and the published amino acid sequences of their corresponding proteins.