title: Product analysis of in vitro ribosomal protein synthesis for the assessment of kinetic parameters.
abstract: For the characterization of the product distribution of in vitro ribosomal protein synthesis a new method is introduced in which radioactively labeled peptides are separated on a reversed-phase HPLC column and detected on line with a flow radioactivity monitor. Employing this procedure the kinetics of product formation under pre-steady-state conditions were measured under a variety of conditions. These measurements yield the intrinsic monomolecular rate constants for peptidyl transfer (greater than 20 s-1) and translocation (rate limiting for elongation). The usefulness of this technique for accuracy measurements is illustrated.
mesh_terms: D002250:Carbon Radioisotopes; D002851:Chromatography, High Pressure Liquid; D066298:In Vitro Techniques; D007700:Kinetics; D010445:Peptide Elongation Factors / Q000494:pharmacology; D010458:Peptidyl Transferases / Q000494:pharmacology; D012269:Ribosomal Proteins / Q000032:analysis / Q000096:biosynthesis*
chemical_list: D002250:Carbon Radioisotopes; D010445:Peptide Elongation Factors; D012269:Ribosomal Proteins; D010458:Peptidyl Transferases