Figure 2

Representative deconvolved MS spectra for serum amyloid A (SAA) in the plasma of a critically ill patient. SAA identification: A) native SAA minus arginine-serine from the N-terminus (M⁺ = 11,439); B) native SAA minus 35 Da and arginine from the N-terminus (M⁺ = 11,492); C) native SAA minus arginine from the N-terminus (M⁺ = 11,527); D) native SAA minus 35 Da (M⁺ = 11,648); E) native SAA (M⁺ = 11,683); and F) methionine oxidation of native SAA (M⁺ = 11,700).