baseline is drifting badly, is that the column or

whats a normal gradient for a peptide this size

ms/ms or it isnt identity

truncations show as a mass deficit matching one or more residues. you need the sequence to say which

214nm sees the amide backbone so it sees everything. 280 only sees aromatics

nobody runs enough blanks, including me

if the lab reports area percent without stating the wavelength, the number is less useful than it looks

whats a plus one dalton shift usually