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. Author manuscript; available in PMC: 2009 Oct 22.
Published in final edited form as: Biochemistry. 2003 May 13;42(18):5478–5492. doi: 10.1021/bi027101p

FIGURE 5.

FIGURE 5

MALDI mass spectrum of the peptide spanning residues 477–514 after the treatment with PNGase F (A). The experimental isotopic pattern (B) of the peptide (m/z 4450.3) is compared with the theoretical calculated pattern with Asn as residue 504 (C).