Figure 1. Purification of 9-O-AcSGPs and identification of spectrin.

A. A representative SDS-PAGE (7.5%) profile of purified 9-O-AcSGPs from RBC_VL. Lane M shows molecular weight standards. B–C. PMF spectra of tryptic fragments of two high molecular weight 9-O-AcSGPs were identified as α- (B) and β-spectrin (C) by MALDI-TOF MS. Each fragment is denoted by their m/z values and sequence range in human α- and β-spectrin.