title: Sequencing of proteins extracted from stones.
abstract: Proteins from urinary tract and gallbladder stones were extracted and characterized to determine the composition of the matrix and possibly unravel the role of the organic phase in stone formation. Proteins from crushed stones were extracted by electrodialysis and concentrated in the Amicon centricon cartridge or by lyophilization after dialysis against distilled water. Aliquots were first analyzed by isoelectric focusing in gel and if suitable subjected to two-dimensional (2D) electrophoresis. The most promising spots were harvested and the N-terminal amino acids sequenced, thus providing maximum information with minimum expenditure of material. The 2D separations and amino acid sequences of several protein extracts demonstrated similarities and differences in composition and achieved the identification or demonstration of previously and recently detected polypeptides.
authors.affiliation: Veterans Administration Medical Center, Buffalo 14215.
authors.forename: J P
authors.initials: JP
authors.lastname: Binette
authors.forename: M B
authors.initials: MB
authors.lastname: Binette
mesh_terms: D000595:Amino Acid Sequence; D002129:Calcium Oxalate / Q000032:analysis; D002769:Cholelithiasis / Q000737:chemistry*; D015180:Electrophoresis, Gel, Two-Dimensional; D006801:Humans; D007525:Isoelectric Focusing; D008969:Molecular Sequence Data; D011506:Proteins / Q000032:analysis* / Q000235:genetics*; D014527:Uric Acid / Q000032:analysis; D014545:Urinary Calculi / Q000737:chemistry*
chemical_list: D011506:Proteins; D002129:Calcium Oxalate; D014527:Uric Acid