... [41]. In the presentstudy, most of the proteins from both EDTA-SM andWSMmigratedinthegelwithnodistinctpattern,leavingadark continuous smear after silver staining (Fig. 4). Nodiscrete individual ... acid-richglycoproteins would be present both within the silk gel priorto mineralization and also as electron-dense patches at the surface of b-chitin. The presence of chitin combined with the silk-fibroin-like ... to the WSM, andconsequently the EDTA-IM. Hydroxyproline, hydroxy-lysine and phosphoserine were not detected in WSM, WIM,EDTA-SM and EDTA-IM. The comparison of the amino acid composition of the main...