FIGURE 7.

Identification of M. sexta ferritin in band 2 by MALDI-TOF mass spectrometry. A, amino acid sequence of mature light chain ferritin (GenBank™ accession number AAF44717). Lines below the sequence indicate the tryptic peptides that matched the masses found in the mass spectral analysis. Uppercase letters correspond to the matching masses listed in column 1 of B. B, the observed and corresponding calculated monoisotopic (MH⁺) masses for the tryptic peptides indicated in A are listed in columns 2 and 3. Peptides with putative residue modifications are indicated in column 4.