| Peptide sequencing by ESI MS / MS of in gel tryptic protein digests revealed the identity of eight proteins : endothelial actin binding protein , myosin , elongation factor 2 ( EF 2 ) , elongation factor 1alpha 1 ( EF 1alpha ) , heat shock protein 90beta ( HSP90beta ) , glucose regulated protein 78 ( GRP 78 ) , membrane organizing extension spike protein , and actin . ^^^ |