Figure 2.
MALDI-TOF mass spectometry analysis of Torpedo MuSK binding partners. (a–c) Coverage maps of experimental tryptic peptides compared with theoretical tryptic peptides from databases obtained with ProFound™ software were shown. Coverages of 6% with rat MuSK (a), and of 16% with the COOH-terminal peptide (residues 1124–1374) of mouse MAGI-1c (b) were obtained from the 140-kD cross-link product. A coverage of 35% with the COOH-terminal peptide of MAGI-1c was obtained from the 40-kD polypeptide coimmunopurified with MuSK (c).