... 7.0) at a concentration of 0.5 mgÆmL)1. Spec-tra were obtained as the average of five successivescans with a bandwidth of 1.0 nm and a scan speed of 20 nmÆmin)1.Steady-state tryptophan fluorescencemeasurementsMeasurements ... Salmon testesDNA and some analytical grade chemicals such as EDTA,Tris ⁄ HCl, CaCl2, NaCl and mineral oil were obtained fromSigma (St Louis, MO, USA). Salmon testes DNA for theenzyme activity ... Institute of BioAgricultural Sciences, Academia Sinica, Taipei, Taiwan, ROC2 Institute of Physics, Academia Sinica, Taipei, Taiwan, ROC3 Department of Biochemistry, University of Minnesota College of...