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(A) Protein identification of galectin-1 using the MS/MS spectrum of the amino acid sequence SFVLNLGK (m/z 471.32; 2+) was determined with the fragmented y-ion and b-ion; (B) Peptide SFVLNLGK of galectin-1 showed the ratio offormaldehyde-H2 labeled peptide (m/z 467.30) to formaldehyde-D2 labeled peptide (m/z 471.32).
