1Laboratory of Marine Biochemistry, 2Laboratory of Environmental Biochemistry, Graduate School of Agriculture, Tohoku University, Tsutsumidori-Amamiya, Aoba, Sendai, Miyagi 981-8555, Japan
The distribution of calcium bound to parvalbumin (PA) in water-soluble fraction of ordinary muscles from four species was studied. About 65% of the calcium existed in the PA fraction with carp and pacific cod, however, only about 10% of the calcium existed in the PA fraction with pacific saury and rainbow trout. Molecular masses of these PAs were 10-12.5kDa. Three and two PA isoforms were detected with carp, pacific cod and rainbow trout, and with pacific saury, respectively. The mobility and relative ratio of PA isoforms were very different among fish species.