Table 2.

Free endogenous phenylalanine in lysates prepared from white muscle and gills of P. brachycephalum maintained at control temperature (0°C) or acclimated to 5°C and of Z. viviparus acclimated to 5°C or maintained at control temperature (10°C)

Phe (mmol l-1 lysate)
SpeciesNWhite muscleGill
P. brachycephalum
   0°C50.32±0.05*0.14±0.05
   5°C50.21±0.03*0.08±0.01
Z. viviparus
   5°C40.10±0.030.11±0.02
   10°C30.08±0.010.08±0.02
  • Incorporation of [2,3,4,5,6-3H]Phe was corrected for free endogenous Phe.

    Values are means ± s.e.m.

  • * A significant difference (P<0.05) of free endogenous Phe concentration in lysates prepared from white muscle between species and within species at varying acclimation temperatures

  • A significant difference (P<0.05) of free endogenous Phe concentration in lysates prepared from different tissues of the same species acclimated to the same temperature