The authors studied the characterization of synchronous fluorescence spectra of 5-methyluridine-protein system;the spectral characterization and intensity of synchronous fluorescence were related to the value of Δλ,reaction medium,reagent concentration,ionic strength,addition sequence,reaction time,reaction temperature,and so on.On basis of the experimental results,the new method for the determination of the proteins was developed with 5-methyluridine as a molecular probe.Under the optimum experimental cond...